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.
Jack Nicklaus entered a total of 1,500 tournaments during his professional golf career. He competed in numerous events, including major championships, where he won 18 titles, the most in history. His extensive participation in tournaments solidified his legacy as one of the greatest golfers of all time.
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".