Agostino Giglio is a pretty fucking awesome pianist from Italy. He does covers of popular songs, whether or not they originally had a piano part and he usually does a bit of improvisation too. He does make a few mistakes every now and then but he's not a professional. The best part (for me) is that he's a big fan of Muse and Radiohead
He's been on TV in Italy a couple of times, and videos of that are on his youtube channel.

Some of his covers:
Hysteria - Muse

Smells like Teen Spirit - Nirvana
(This one has a bad start)

Creep - Radiohead

He also started playing guitar:

Hysteria - Muse (Again)

Plug in Baby - Muse