Legends' headshape suggestions!!

i wana start makin some missing legends fo the game but im having a hard time getting the rite headshapes...

i already made MJ fo miself but i need suggestions fo:

Charles Barkley
Hakeem Olajuwan
John Stockton
Dennis Rodman
Karl Malone
Scottie Pippen
David Robinson
Patrick Ewing
Shawn Kemp