To each his own. Have you read the stories? IIRC, Jeeves is never supercilious, just quietly imperturbable. He's the perfect calm, correct counterpoint to Bertie's nutty irresponsiblity. Fry is far more believable as Oscar Wilde than Jeeves, IMO.
I haven't seen Fry's protrayal of Oscar Wilde, but I can imagine he would do it well. I did like him as Jeeves, though.