The only gimmick idea I can see for him as the 'Masterpiece' is have him be an artist. He comes down to the ring in a beret with with a canvas, or sketchpad or whatever, something to draw on. He then goes in there and beats up the opponent. When they are laying on the mat in defeat, he whips out a sketch pad and does a quick draw of them. The next week, the sketch is water colored and finished. He could title it, explain it's artistic views, etc. His interviews could include all those words you see in those "high art" books. He could even try to create a couple of wrestlers into his own 'Masterpieces'. He could try to create something out of nothings (Maven could use a gimmick).
I may be the only person in the world who thinks that could work...