I'd like to suggest 1967 as a pretty darn good year.

4 yr olds: Buckpasser, Moccasin and Assagai.
3 yr olds: Dr. Fager, Damascus, Proud Clarion, Gamely, Fort Marcy and Cool Reception
2 yr olds: Forward Pass, Dancer's Image, Dark Mirage, Exclusive Native, Sir Ivor and Vaguely Noble.

Of course, 1968 saw the introduction of Shuvee, Arts & Letters, Reviewer, Majestic Prince, Ta Wee, Ack Ack and Gallant Bloom. Another great year.