In regards to the mention of Michel Graillier, I have but one of his LP's - Ad Lib, on Musica, with Aldo Romano and Jean-Francois Jenny-Clarke. It's solid, left-of-mainstream fare with the standout being the title track, a solo piano improvisation.
Bernardo Sassetti, from Portugal, is another of the fine younger crop of European pianists. Dig his trio and solo recordings on Clean Feed; they're excellent.
Nobody's mentioned the British pianist Howard Riley yet, so I will. Some very inside work and a lot more very outside...