I think I've only ever had two 9 star players.

Both have been strikers, the first one a Turkish player called Luftiz or something daft like that.

The other one is a striker I still have in my team now, called Dawid Radizo who has twice made it to 9 stars in my team.

I've just picked up a very fast 18 yr old 5 star striker and I'm tempted once I've signed him (got to sell a player to make room for him) to power train him and see if I can make him my 3rd 9 star player ever.