Memphis Depay is a great goal scoring winger... Could try Muniain (right footed though, better used as an IF) but I don't seem to be able to have as much success with him this year as per previous FM's... Another option would be draxler, you may be able to negotiate the price to be within the 25m budget...
Lucas Ocampos.
Reus if you can stretch to his 29million release clause.
Bernard.
Volland as an IF.
Fischer.
Rotariu.
Vitinho.
Andrija Zivkovic as an approach to sign.