I adore
Peter but feel I have to qualify that statement and include "the name" in front of
Peter. Therein lies the problem with
Peter -- people still use the slang. I've considered
Peter myself but with the surname Burns, well, you get the idea of how bad that would be. I'm still glad other people are considering it, though.
Of your combos, I like:
Peter Benjamin -- like the flow of this best
Peter SamuelPeter Silas