My top 10:
1 Phil Jackson
2 Gregg Popovich
3 Red Auerbach
4 Pat Riley
5 Lenny Wilkens
6 Don Nelson
7 Jerry Sloan
8 Larry Brown
9 Doc Rivers
10 Jack Ramsay
All 10 are taken from the NBA's release of the 15 greatest coaches of all time. The 5 on that list I left off were:
Steve Kerr
K.C. Jones
Chuck Daly
Erik Spoelstra
Red Holzman