I read the first post then skimmed through the rest but did you know that Kabutops is more easily countered in UU than it is actually in OU? That's just something I found very interesting. The Quagires and Pilowraths (both great Gyarados counters btw) just kind of stop it cold in UU (Kabutops).
This is actually quite true, its probably more due to how UU's are just better are covering for their weaknesses since they have to deal with a far more varied metagame. With that said it means you need a plan and have to stick to it while generally covering for weaknesses.
Anyway I have a few sets I use quite regularly within OU.
Drapion@Black Sludge
Ability: Battle Armour
Impish, HP-220, Def-252, S.Def-38
-Confuse Ray
-Knock Off
-Crunch
-Roar/Whirlwind
Too many people underrate the power of luck, I have seen C-ray completely screw over too many people who think its nothing. It may not mean anything on something fragile. But when your dealing with a bulky pokemon with only 1 weakness that can take off your item or phaze you, you should be worried.
Confusion can break your team apart over extended periods. Since even the popular RestTalkers are not immune to it. Bring it out after the Stealth Rocks are out and it will wear down a team very easily.
Hitmontop@Leftovers
Ability: Intimidate
Careful, HP-188, Atk-70, Def-128, S.Def-124
-Revenge
-Stone Edge
-Mach Punch/Bullet Punch
-Bulk Up
This works under the same principles of the Curselax, just about nothing can OHKO this set. Revenge is possibly the most underrated move ever throwing off repeated 120 base attacks with no defense downs. I've been practically using this near unchanged since Advance and its only better in D/P. Bullet Punch is handy for handling the infinitely annoying Gengar and can hit some fast fragile psychics. There is an alternate EV spread which works almost as effectively using Technician and Impish instead for the record.
I won't boast it anything being special because its not, there are many things which can and will wall it. However what can be boasted is its simple and effective. Theres just really nothing overly wrong with it, I mean its not even terribly afraid of a Wobbuffet if trapped since it can stalemate it.
Drifblim@Sitrus Berry
Ability: Unburden
Bold, Def-216, Spd- 32, S.atk-98, S.Def-164
-Disable
-Will O'Wisp
-Shadowball
-Explosion/Recycle
This is actually my favourite Pokemon ever and possibly my favourite set I dub the
'Zeppblim'. It pairs up brilliantly with Hitmontop or Drapion especially either one covering each others weaknesses. This thing requires heavy prediction but the payoffs are absolutely amazing. Disable wrecks the large majority of OU who rely on maybe the one coverage move since very little can OHKO.
Will O'Wisp is always welcome, Sitrus Berry gives a massive 110HP recovery and 2x speed and activates at half health automatically. The beauty of this is if you can guess the damage that activates Unburden than its possible to Disable
and Burn the opponent in one move only.
Explosion always guarantees something goes down or gets cripple with the ship when its job is done. Though Destiny Bond can actually be used as well for warding enemies off. However if you want it to stick around, Recycle can be used for psuedo-healing and reactivating those speed boosts if you have to switch out. Unfortunately Recycle isn't implemented in Shoddy which is a shame since its actually one of Drifblim's better options.
Shadowball is simply for a STAB attack, however its easily replaceable by HP Fighting/HP Flying or Thunderbolt depending on your needs. The EV's let it usually survive two Dragon Claws from a max attack Garchomp or a SD Dragon Claw which is handy since Disable goes through Substitute. Special attack lets it OHKO Gengar with Shadowball. Special defense always lets it survive a Gengar Shadowball and survive half-assed special attackers like Starmie. Its major problems are Pursuit Weavile and Tyrannitar. However thankfully it can make light work of Weavile being able to Disable or Burn the Pursuit.