Yeah, Gibbons at that stage was fresh out of the UK, where he had done Rogue Trooper for 2000AD Comics, and was at the height of his powers. (I actually don't recall him being involved in any comic for a long time now.)
Joe Staton was indeed the GL artist for most of the 80s. I liked his work from All-star Comics (Justice Society) in the late 1970s, I guess, although I guess it is a little dated now.
Neal Adams on the other hand hasn't really dated at all. The art for GL/GA could have been done yesterday, within the parameters of realist superhero comic book art.
