Your top 3 comedians

I assume, based upon your list, that you are asking for standup comedians, rather than groups of comedians.

In no particular order:

Bill Cosby (mostly for his standup work, although some of his TV work was good too.)

Bob Newhart (Again, mostly for his standup work, but again, his TV work was good too.)

Jerry Seinfeld (This time mostly for this TV work, but his standup was good too!)

If you were allowing comedy groups, my list would have:
The Marx Brothers
Monty Python Flying Circussssss
The Three Stooges

My three cents worth

Rodney Dangerfield
Richard Pryor
Groucho Marx

How could I forget Rodney.....:-(

"My wife, she likes to talk while having sex. So the other night she called me from the hotel..."

Rodney is THE king without doubt. Thnx Trejla.

Ali G
Borat
Bruno

oh...wait...that's the same person...well...it looks like he's the new king now.

Stephen Colbert
Jon Stewart
Jim Carrey