As of the 2008 season, that would be Sam Snead with 82.
4
Kathy Witford
Sam Snead
Steve Williams (Tiger Woods's former caddy). With Tiger, he won 13 majors tournaments.
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.
The 1997 US PGA Championship.
Jack Nicklaus
Ali Abdullah-Ezzani has won 2 amateur Golf tournaments in the Sacramento tournament in 2005.
42
Tiger
Fred Couples, as of the end of the 2012 PGA season, has won 1 major golf tournament. That tournament was The Masters in 1992. He also won The Player's Championship in 1996, which isn't one of the 4 major tournaments (The Masters, U.S. Open, British Open, and the PGA Championship), but is sometimes called the "fifth major".
Tiger Woods has won 70 PGA tournaments to date.