Jack Nicklaus, he's won 6.
The 1997 US PGA Championship.
Steve Williams (Tiger Woods's former caddy). With Tiger, he won 13 majors tournaments.
Roberto De Vicenzo
Seve Ballesteros won over 90 international tournaments. He also won the World Match Play Championship 5 times and The Open Championship 3 times. In total he won around 100 major golf tournaments.
Ali Abdullah-Ezzani has won 2 amateur Golf tournaments in the Sacramento tournament in 2005.