I only watched from 90s on: Will Farrell is definitely the funniest overall
Norm Macdonald - best weekend update , Kevin Nealon 2nd
Darrell Hammond - best impressionist, Dana Carvey 2nd
All the fat guys are funny, Moynihan is underrated.
Kristen Wiig and Amy Poehler are the best females in the 2000s.. Tina Fey sucks in my opinion and is cookie cutter /safe humor, where Amy and Kristen have that off kilter humor.
Andy Samberg is really funny but is also a 1 trick pony.
Other favorites: Will Forte, Fred Armisen, Bill Hader