Samples are horribly outdated at the moment, assuming they get updated soon I wanted to submit some of mine
This Mega Tyranitar + Kartana team is one I've been having a lot of success with over the best part of 3 months, it was built to completely counter cheese and extreme building styles such as HO, Stall, other weather teams, etc. Generally just a good build for making sure the better player wins more often and has outs against a lot of things it is weak to.
It's built around Mega Tyranitar, a fantastic mons for setting rocks up and keeping them up, due to beating plenty of defoggers in the tier at the moment. However, it mainly acts as support on this team for the other wincons. Kartana is one of the main win conditions of this team, as with the support of Tyranitar for Pursuit, allowing it to take out the likes of Mega Latias and Zapdos, it's able to break most of its checks with fightinium Z, such as Mega Scizor or Corviknight, Knock Off is also insanely good on this team due to its hazard stacking nature. Skarmory is the team's main check to the likes of Rillaboom, Kartana, and Garchomp, as well as being a hazard setter. Due to Tyranitars ability to break many defoggers in the tier I decided to make this team a hazard stacking one, and Skarmory can set up spikes, meanwhile, its teammates can let spikes stay on the field. Reuniclus is another of this teams big "win-cons", and is stellar at destroying fatter teams, which this team by any means doesn't struggle with but its nice to have the matchup basically secured, thunder is the best coverage move for CM Reuniclus, lets it hit and wear down Heatran, SlowTwins, and spread status on Latias, Hydreigon, or Corviknight. Excadrill is the main hazard control on this team, being able to spin away opposing rocks and not get chipped down because of leftovers, its also the team's main speed control, when in sand its able to outspeed the entire tier, unboosted, and some boosted mons as well, which makes it an amazing cleaner. It also greatly appreciates being paired up with Kartana, as its ability to break pokemon such as Corviknight, Skarmory, and Tangrowth make excadrill excellent for sweeping late-game. Toxapex is just here mostly as glue, and also the team's obligatory Greninja answer. Haze is good for stopping set up sweepers and Toxic Spikes can aid Excadrill and Reuniclus in sweeping as well as being generally tedious for the opposing team to get rid of. Overall, this is an incredibly solid build and I, as well as many others who have used this team, have found great success with it.
I really like this Balance Team, it has surprisingly good longevity and is incredibly threatening to opposing teams.
Mega Lopunny and Hydreigon make the main core on this team, being incredibly potent tools against Offense and Bulk respectively. Unaware Aromatherapy Clefable is an amazing roadblock to set up sweepers like Mega Garchomp, Hawlucha, and opposing Calm Mind Clefable, while being able to support the team through Knock Off, and Aromatherapy which is great for supporting Hydreigons longevity. Sub Smack Down SD Landorus-T + Toxic Spikes Toxapex is an idea I stole from faded, the idea is that sub Smack Down lets Landorus break the likes of Skarmory, Zapdos, Corviknight, and Opposing Landorus-T, while Toxic Spike support from Toxapex lets it outlast the likes of Tangrowth and Slowbro. Heatran and Toxapex serve as defensive glue, being able to check most pokemon you need to be checked on this team. Heatran being the rocker frees up Landorus and Clef greatly meanwhile Haze on Toxapex is a good backup for pokemon like Volcarona or Tapu Fini. overall a nice team to play ime.