I didn't include the pictures or stats because when I was compiling the DPP UU threat list I already had all of those myself and it was only clutter when people posted their own alongside their write-ups. I don't know if you're doing it the same way so I didn't want to waste my time. If they would help you out I'd be happy to add them in, just let me know!
Machamp (offensive)
Machamp's high Attack, perfectly accurate moves, natural bulk, and lack of common weaknesses make it one of the most reliable Pokemon in OU. It's most commonly seen as an all-out attacker, carrying an incredibly frustrating DynamicPunch and coverage moves such as Payback, Ice Punch, Stone Edge, and Bullet Punch. This set is frequently used in the lead position, usually with a Lum Berry or Focus Sash. When not leading the charge, Machamp usually uses Substitute (with paralysis support) to eliminate the need for prediction.
Suicune (offensive)
Offensive Suicune is almost synonymous with modern bulky offense. Its incredible natural bulk essentially ensures opportunities to set up with Calm Mind, after which Suicune can use its near-perfect coverage and deceptively high Speed to tear through weakened teams. Suicune's attacks typically include Surf (or Hydro Pump), Ice Beam, and Hidden Power Electric. Battlers looking to take a more balanced approach to Suicune can take advantage of its ability to create 101 HP Substitutes, or even use Roar in order to get free wins during Calm Mind wars. Of course, the classic RestTalk Calm Mind set can also be used, and it easily foils teams whose contingency plan is to to deal with Suicune by gradually whittling down its health.
Forretress (defensive)
Forretress is truly a utility Pokemon. It can set up all three entry hazards, use Rapid Spin to eliminate the opponent's hazards, and stay alive throughout a battle with its Steel / Bug typing and absurdly high Defense stat. Depending on team needs, Forretress usually doesn't carry all three entry hazards. Rapid Spin is a staple of all sets, and a variety of attacks fill the remaining slots. These include Payback, Explosion, Earthquake, and Gyro Ball.
Heatran (defensive)
Although Heatran is typically seen on the offensive, a specially defensive Heatran is also an incredibly difficult Pokemon to crack. With a Steel / Fire typing and Flash Fire, Heatran resists Dragon-, Fire-, Ghost-, Grass-, Steel-, and Psychic-type attacks, making it an excellent counter or check to many threats. The most prominent of these are Jirachi, Dragonite, Rotom-A, Shaymin, and Celebi. Additionally, its high Special Attack and Fire STAB gives defensive teams a simple way to threaten Forretress and Skarmory. Defensive Heatran sets vary greatly based on team needs, but typically include Lava Plume, Earth Power, and Roar; Protect, Toxic, or Stealth Rock round out the set. One variant uses Torment with Substitute and Protect, and operates under the fact that most Pokemon only carry a single attack that is effective against Heatran. Finally, RestTalk is also a possibility to increase Heatran's longevity.
Milotic (defensive)
Milotic is a rare sight in OU, but nonetheless an effective bulky Water with several traits that set it apart from the competition. Recover gives Milotic a reliable source of recovery, something that Gyarados, Swampert, and Suicune all lack. Haze is a niche move, but makes Milotic impenetrable to most Calm Mind sweepers and allows it to hold against bulkier Dragon Dance Kingdra and Dragonite. Milotic also learns Toxic, giving it a way to defeat bulkier Pokemon or those that resist Water. Hypnosis allows Milotic to take another Pokemon out of the fight; although it's an unreliable move, Milotic finds many opportunities to switch in. Surf is Milotic's reliable STAB attack, while Ice Beam and Hidden Power Electric can be used as coverage attacks in place of a third utility move. Alternatively, Milotic can use RestTalk for recovery, which allows it to take advantage of its Marvel Scale ability (+50% Defense while statused).
Roserade (defensive)
Roserade is an alternative choice for laying Spikes and Toxic Spikes that has been proven successful at the highest levels of play. Traditional spikers Forretress and Skarmory are both physically defensive Steel-types, while Roserade is a specially defensive Grass-type. This allows it to capitalize on Water-, Electric-, and Grass-type resistances to set up on a wide range of specially oriented Pokemon. While Roserade learns both Spikes and Toxic Spikes, usually only one is chosen. Grass Knot and Energy Ball are Roserade's STAB options, and Hidden Power Fire or Ground are typically used for coverage. In the last slot, Synthesis operates like Recover unless in a sandstorm, while Rest (with Natural Cure) works in all weathers at the cost of necessitating a switch. Stun Spore is another option that lets Roserade cripple switch-ins and deters sweepers from using Roserade as setup bait.
Skarmory (defensive)
Half of the vaunted SkarmBliss core, Skarmory is a staple spiker and phazer for many defensive teams. Its moveset, stats, and typing are almost perfectly suited for its role. Flying / Steel typing grants it excellent immunities and resistances, while a sky-high 140 Defense stat enables it to tank neutral hits. Essentially all Skarmory run Spikes, Roost, and Whirlwind, while the last slot is either Brave Bird or Taunt. It's worth noting that since Skarmory's Defense is already so high, a common EV spread focuses on its Special Defense instead, allowing it to tank neutral special hits.
Starmie (defensive)
Starmie's high Speed and unique movepool make it a good choice for teams looking to fill a specific role. Although it's defensive stats are middling, Starmie packs all the resistances that a traditional bulky Water would have. A Psychic subtype gives it a resistance to Fighting-type attacks, which partially compensates for its mediocre Defense. Very high Speed and access to Recover further extend Starmie's longevity. In return, Starmie can use Rapid Spin to eliminate the opposing team's hazards. Unlike Forretress, the other OU spinner, Starmie outpaces both Rotom-A and Gengar (unscarfed), making it much more difficult to spinblock. Due to its Speed, Starmie also serves as a welcome check to Infernape, a Pokemon who normally terrorizes bulky teams. All of Starmie's defensive sets run Surf, Rapid Spin, and Recover, while the last slot goes to either Thunderbolt or Ice Beam.