I like it! I'd never heard of it before. It's distinguished, like you say, but I think it also sounds a bit... exotic?
Out of you combo's, I like:
Tassilo Arthur
Tassilo Robert (this is probably my favorite)
Tassilo Roger
Tassilo Peter
Tassilo Edmund / Edmond
Tassilo Edgar
Tassilo Idris
Tassilo Marcel
**Always forgive your enemies; nothing annoys them so much**