For me it's Tendulkar, because he wore the brunt of the pressure, but performed admirably.
Richards did exceptionally compared to his peers, but in his day people were just learning ODIs. Running between wickets were poor, 15 over fielding restrictions were not there (introduced in early 1980s IIRC). And there were no guys bowling reverse swinging yorkers at his toes at end of the innigs. Slower ball was not perfected at that time. Spinners were dire in quality, ni Warne, no Murali no Saqlain in ODIs (who are leaps and bounds ahead of spinners Richards played).
Bevan does not belong to that elite panel. He's lucky that bouncers were illegal during his time. Otherwise he would have averaged just 20-30. And even then on slow turning tracks, Bevan was magnficient on Aussie featherbeds, but found wanting on spinning tracks.
If some one wants to add few guys to that elite panel, Dean Jones, Martin Crowe, Inzama ul Haq and De Silva would be a good starting point. These are not as consistent as Richards or Tendulkar, but can match them stroke to stroke on their day. And These are reallly good players under the pressure, and possesed all shots in the book, and play any kind of bowling (which Bevan was unable to do)