So where are we:
He is a conductor.
He is Italian.
He is a perfectionist.
I like to quote him: God tells me how the music should sound, but you stand in the way.
So, obviously he is a nice guy.
He died on the other side of the pond (from my POV)
This is the last clue, although I think it's obvious, but oh well, he lived between the late 19th and mid 20th century.
If nothing helps we will put Zombie on a no-brain diet until he says the name. (for being a bad, bad googeling Zombie)