Jacobi (sp?) from
Papa Roach. His name is pronounce Juh-coh-bee. I really dislike the pronunciations you mentions. Jack-o-bee makes me think of "Jacking a bee" which if you know a little something about American slang, that is not a good thing. Jake-o-bee is not as bad, but it has a wierd sound to me.
Looking at the combos you gave, and using the Juh-coh-bee pronunciation, these are the ones that I like:
Jacoby
WilliamJacoby
NathanielJacoby
Reid Jacoby
Ryan (although I am not a fan of
Ryan)