You seem to be placing emphasis on least number of loses in a season. This is influenced by the number of games played, so percent winning record is better than using loses. Here are the best teams based on this measure:
1. 2011-12 team. Record 34-3 (91.8%) - Joseph, Fair, Melo, Waiters, Triche, Jardine, Southerland. Got to E8 in NCAA (was a #1 seed)
2. 1976-77 team. Record 26-4 (86.7%) - Bouie, Shackleford, Byrnes, Williams, Kelley, Kindel, Orr. Got to S16 in NCAA
2. 1978-79 team. Record 26-4 (86.7%) - Bouie, Shackleford, Headd, Orr, Cohen, Moss, Harmon. Got to S16 in NCAA
2. 1979-80 team. Record 26-4 (86.7%) - Bouie, Orr, Headd, Moss, Santifer, Payton, Schayes. Got to S16 in NCAA (was a #1 seed)
3. 2009-10 team. Record 30-5 (85.7%) - Johnson, Rautins, Joseph, Jackson, Jardine, Triche, Onuaku. Got to S16 in NCAA