For example I looked up Kenyon Martin today. I remember him being an all-star so I figured he must have had multiple 20/10 seasons. Turns out he never averaged more than 17 ppg and only got 10 rpg one season.
Muggsy Bogues surprised me positively. I thought he was just a role player like Early Boykins. Turns out he had several seasons averaging over 8 apg and a couple seasons averaging over 10 apg.
There was a good post on r/nbadiscussion talking about how he was snubbed a few times of All-Star selections like the one year they let fan voting alone determine starters and B.J. fucking Armstrong started in the All-Star game which helped push Reggie off the team as one of the snubs.