Raposa I don't know, the one up front thing nowadays means the type of forwards I have traditionally liked aren't really right for the job.
The Blackburn lad seems to score quite a few around the six yard box, he could be worth a look if his all round game is decent.
My main concern would be to devise a system that suits Gelhardt, and if you aren't going to do that sell him.
Gelhardt would be a 20 goal a season player if you work him into the team.