I was cleaning out my garage the other day and found my old autographed ufc 68 poster.....I was looking at the 4 fighters on the poster, and was wondering which one of these fighters you'd like to see come back for 1 more fight....
Tim Sylvia, Rich Franklin, Matt Huges, or Randy Couture 
Not on your list op but i want to see lawler vs gsp... Shit will go down
I'd say rich
Pride rules.
EDIT: One time UFC with Pride rules. damn it would be very very interesting. Todays rules are so fucking bad imo. One finger on the ground so you do not get kneed in the face. But I know I can only dream because it will never happen.
Cole Konrad
Rich vs Hendo rematch sounds good to me