He was awesome in Robin Hood. Actually, and this my opinion, he carried that gawd awful movie because Costner just didn't make a good Robin Hood.
I still watch it when it comes on, only because it's like a slow motion car wreck.
Honestly, take Cary Elwes out of "Men in Tights", give him the same script, and he would have knocked that out of the park. Put Costner in that parody.