Hard to decide, In my mind Murli and Warne are ahead of Kumble because their averages and strike rates are considerably better than Kumbles. Warne had good variations and spun the ball allot on Aussie wickets where the other 2 struggled somewhat. Murli perfected the doosra and his arm ball is really good and sometimes he makes it look so easy. Kumble relies alot on his height to get the bounce and he has some really good deliveries but doesn't spin the ball that much. His average is about 9 points higher than Murlis and he also has played more matches than Murli.
For me its Murli, his average and strike rate are better than both those players and his 63 5 wicket hauls are just insane.