Olly on his own wouldn't interest me but Olly and Caroline together worked brilliantly on The Xtra Factor, although it's not the sort of show that really needs a co-host. Really don't get the appeal of Emma Willis - replacing Dermot O'Leary is a whole different ball game to replacing Brian Dowling.
Laura Whitmore is my tip, Stephen Mulhern is my fear.
I agree - no to Olly solo, but paired with Caroline, they'd be great (Caroline as lead presenter though). I've never been a fan of Laura Whitmore - she just seems cold and uninteresting.
I like Emma Willis, but don't think she'd suit X Factor. Stephen doesn't stand a chance IMO - even though I don't mind him.
The only other person I can think of that ITV would go for is Vernon Kay. He's already on their books, so to speak, and I'm sure the media would love the rivalry between husband and wife on Strictly.