Stu Ungar is considered by most professional poker players to be the best Texas Holdem poker player who ever lived. No poker player equals Stu’s reputation, and currently the only player who could contend is Phil Ivey. Honestly he has a good chance with his WSOP main event final table.
If this were not enough, he is also widely considered to be the greatest player of gin rummy who ever lived, and gin rummy is a rather different game than poker without any bluff occurring.
Stu Ungar was so good at gin rummy and dominated his opponents so artfully than he could not find player willing to play gin for money. This is why he turned to poker and became once more the best player in his game.
Stu Ungar is the only poker player to have won the WSOP main event competition three times (Johnny Moss won three times as well by the first time was by vote). He also has the highest winning rate ever in high buy-in tournaments, winning over ten in the thirty he enrolled in.