#1 - Steph: The Warriors hadn't won a championship since the 70s and were bad for about a decade. Bringing 4 championships to the franchise gives him a slight edge.
#2 - Rice: Slight deduction for Montana and the Niners winning a chip before he got there. Still won 3 while he was the man (edit: thanks to
@premier58 on the correction).
#3 - Bonds: Dude was a video game during his prime. His team just never won a Championship.
This is based only value to the Bay Area. The Warriors also are the only Bay Area basketball team while the Bay has the fan base split between Niner and Raider fans.
Top 10 Bay Area Players:
1. Steph Curry
2. Joe Montana
3. Jerry Rice
4. Willie Mays
5. Barry Bonds
6. Rickey Henderson
7. Steve Young
8. Rick Barry
9. Tim Brown
10. Chris Mullen