Who has the best left hook(or lead hook) in MMA?
If you're feeling ambitious, you can choose one for each weightclass.
lil nog(lead hook)
http://i160.photobucket.com/albums/t169/Inspectorchao/MMA/NogDropsShogun.gif
not as powerful as daleys but far more technical.
Hendo.... In a Parralel universe. 
I'd say Manhoef or Overeem.
mdh2k10 - paul daley
Yup
Gotta be Daley..
James Toney
stout
me
tyvm
SEMTEX
Carlos Condit 
maybe not THE best but thats a damn good one. and i love that gif
LW - Stout
WW - Daley
MW - Vitor?
LHW - Rampage
HW - Cain
FW-hominick
LW-stout
WW-daley
MW-leben
LHW-rampage
HW-dos santos
Are we only talking orthodox/lead hand left hooks, because I always liked Jens' left hook.
Not too many great left hooks in MMA, buuuut...
Zentsov has a MEAN one at HW...and Rampage at LHW
Jens "lil evil" Pulver
P4P Pulver
I'm surprised no ones mentioned Manhoef,
Manhoef #1
Daley #2
I cant even begin to count the number of left hand finishes in this video by Jens. A few of them he only uses the arm, no body movement. The first one in the vid comes as he is moving away.
http://www.youtube.com/watch?feature=player_embedded&v=VALpFAT2HSQ
if a blue would please... ty in adv
Roman Zentsov had a vicious left hook of death. Shogun KO'ed Chuck and Machida with his. Jens fought lefty iirc, his left was a cross.