Randy Couture
Liddell
Ortiz
Belfort
Randleman
Coleman
Gonzaga
Sylvia
Rizzo
Mo Smith
Horn 
Forrest has a surprisingly great top 5
Franklin
Ortiz
Rampage
Rua
Sonnen
Machida
Couture
Rua
Evans
Ortiz
BJ Penn
Thiago Silva
Franklin
Sokoudjou
Jones (in 3 weeks)
Henderson (after Jones)
That's a nice list.
No.
Hendo has fought everyone...pride champs, ufc champs, strikeforce champs, MW, LHW, HW, the former GOAT, etc.
There are others that have impressive lists, but Hendo's is fucking insane.
Go to en.wikipedia.org/wiki/Dan_Henderson look at his resume and it is about as good as it gets. The guy has faced just about every legend in the sport from 185 through HW.