You are f**king dreaming. Name them, there are about 6 that i will give you even though i'd argue some of them.
Slater
Inglis
Barba
Stewart
Dugan
Bowen
Hayne
Ok 7.
ok if we are going off top form at their peak then these guys would be better than Gordon
Hayne - 09 turned the whole comp on its head
Boyd - 2010 Great year for him arguably the best Dragons player that year imo
Slater - best fullback
Inglis - unstoppable on his day due to his size and speed
Barba - look at this year
Stewart - great support player and can set up plays himself when he is firing Manly seems to be going well
Bowen - Can really take control
Dugan - Similar player to Stewart. If he's going well Raiders are playing well
Hoffman would be close as he has showed he has a massive future
Gordon while he is a talented player he is too injury prone for his age to get any better imo and also he has spent majority of his career at Wing and only had been a fullback since 2010 and pretty much been injury prone.
If he is injury free at Sharks next year we could see him have his best year but will it be close to any of these guys i have mentioned? i don't think so.