Not too sure of the concept but give it a go...
Rob Key - a bit unlucky when he was dropped, never particularly let England down
Jacques Rudolph - struggles to perform at International level but is clearly a class above fc cricketers
Ramneresh Sarwan - a great, (can't remember who he was, someone on here probably knows) said Sarwan would average 60+ in test cricket, a let down considering his vast ability and personally its one of the players that's annoyed me most in not scoring runs as often as they should.
Richard de Souza - often bought up as one of the best batsmen never to have played for the west indies, my dad is a very firm believer of this
Mark Ramprakash - same as Rudolph really
Dwayne Bravo - bags of ability, fielding prowess and enthusiasm, I never got the feeling he applied himself as a batsmen down the order though. 100 against Oz shows his ability to bat.
James Foster - played cricket in the wrong era really, its very comferting going to chelmsford and knowing practically every chance your keeper has will be taken
Lonwabe Tsotsobe - still more to come from him I imagine, unlucky to be in an attack with Steyn Morkel and now Philander who looks to have taken his opportunity
Trent
RP Singh - always thought he had a few weapons, pretty good pace, swings the ball, bowled well in tandem with khan when I saw them in England the time before last, yet he's never really done much Internationally
Pedro Collins - can be devestating, a left armer who gets prodigious swing, though kolpack indiscipline and bad luck meant he wasnt playing while talented stars like Darren Powell were playing regularly.