Navvy and Graffy did a lot more in their carreers though, but if Hingis continued to play and win she could be considered the greates of all time.
Don' think so.
She even lost slam finals to grandmas with reconstructed knee.
And consider her opponents when she won slams: Pierce, Novotna, V. Williams (just 17), Martinez, Mauresmo. Only 2 "blue chip" slams, but 3 AOs.
She KNEW in summer of 99 that she never would be the "greatest of all time". That broke her heart .....