@ Gliscor w. U-Turn: It depends on how you use it. It's most popular use is defensive wall and Heracross stopper. That has zero use with U-Turn. However, we can't overlook Gliscor's 95 attack and speed... An offensive Gliscor can make use of U-Turn well.
Otherwise, Scizor is great, as mentioned before. STAB, base 130 attack. Good for Turning to fragile sweepers as it will take a hit for the one switching in. Wish + U-Turn Jirachi is great. Butterfree is... ok... because it has DoublePowder. However, even though it has STAB, 45 base attack is not something to talk about. Scyther is a weaker, less defensive, but much faster version of Scizor. Bat and Flygon make great use of it. As Persian. Primeape and Infernape make use of it... And preety much any lead.
I'll list 'em.
Jumpluff has nothing to lose, as both Attack and Sp.Attack are 55.
Yanmega has good scounting purposes, 76 + STAB, and hit's it's walls on tyhe other side of the spectrum.
UU, Lumineon?? has it...
Beedrill, Raticate, Pidgeot, Fearow, Farfetch'd.
The three birds have it. Zapdos is most common. Scounts with it. Moltres does better with it... But isn't common. Uber users, say hi to Mew.
Furret?
Ledian?
Xatu??
Ambipom, Fake Out, and U-Turn. 'Nuff said.
Celebi has a use for U-Turn. (Will hurt T-Tar on the switch, and Weavile/other darks.)
Beuatifly/Dustox... :(
Swellow makes excellent use with Guts, Flame Orb, U-Turn.
Pelipper and Masquerain. *sigh*
Ninjask. Does well when CB/SD'd and offensive. Preety lame otherwise.
Illumise/Volbeat. Makes great UU BPers. Meh.
Straptor makes great use of U-Turn. 125 attack, Intimidate...
Mothim and Vespiquen. Meh.
Pachirusu, Purugly. Meh.
Chatot. Huh.
NOW then...
Uxie/Mesprit. Defensive, make great U-Turners.
Azelf- 125 base attack. 115 speed. Great!
Phione/Manphy. In Ubers, U-Turn will serve Manaphy quite well, what with Psychics. Phione will deal with Grumpig and Hypno in UU.
Wow, a large list.