"I really liked Harry Connick. I don't think that you need to replace Simon with somebody who is like Simon because no one will ever be Simon. It's impossible," said DioGuardi during a Friday morning appearance on Sirius XM's The Morning Mash Up! radio program.
"[Cowell] does things that no one has ever done. He's created this tremendous character who is funny, still has a human side, but is just blatantly honest. So what I liked about Harry is he is put so much time into helping those contestants and I think he really did help them."
Regardless of who it is, DioGuardi feels it is necessary for a fourth person to join the American Idol judging panel -- something that former executive producer Nigel Lythgoe recently stated isn't a good idea.
"Now people have gotten used to four judges. When I first came on, it was definitely 'Oh she's taking over Paula,' which was not the case," explained DioGuardi.
"I was never there to take Paula's position. I do think that the four judges works. It's really about getting someone who has a lot of experience in music to replace Simon."