So, here it is because you demanded it(well Leee777 was the only one who demanded it). Here's Bradley Cooper as Guy Gardner, if he can't play Hal doesn't mean he can't play another Green Lantern.
So for the mock-up I used Brad's head, then edited his hair to give him the bowl cut of Guy. I found a costume of Guy Gardner(bless all of these cosplayers). I edited his arms to give them a more muscular look(the cosplayer who I got the costume was pretty lanky). Minor changes all over the place then Voila! Guy Gardner... I guess.