Awesome thread. I'm going to list just current fighters in current divisions. If I listed my all time favorites for each division my list would contain some fighters who are either retired or aren't in the same division anymore.
HW: Cain Velasquez - JustScrap
LHW: Dan Henderson - JustScrap
MW: Chael Sonnen - JustScrap
WW: BJ Penn - JustScrap
LW: Anthony Pettis - JustScrap
FW: Doe's Gina Carano count?
BW: Kid Yamamoto - JustScrap