The 13 who eventually won the Triple Crown. That group includes Sir Barton (1919), Gallant Fox  (1930), Omaha (1935), War Admiral (1937), Whirlaway (1941), Count Fleet (1943), Assault (1946), Citation (1948), Secretariat  (1973), Seattle Slew (1977), Affirmed (1978), American Pharoah (2015) and Justify (2018).
Maximum Security likely ranks as famous (or infamous) due to his disqualification in the 2019 Kentucky Derby.