Oh Lord...Rodman was good only in defense...he did nothing in offense excluding rebounds: probably he didn't score more than 7-8 ppg in career and he was a poor free throw shooter. Keep this in your mind: Rodman was good only at defense. Probably if he was concentrated more on basketball than in his hair, he could be better...

Only 14 ppg in career, low stamina, bad passer. He was a good rebounder tho: 8.4 rpg in career, a good blocker and a good stealer... and his free throw percentage wasn't bad. But too many turnovers per game and his field goal precentage is lower than 50% in career (I think that almost 45-50% of his field goals were dunks).
The stats you're posting include the post lockout Kemp, which was not the same player, at all. For 5 years, from 1991 to 1996 he was the closest thing to Amare Stoudemire you could find - but he was a better rebounder and overall defender -
Now, to see who was a GREAT (I say "GREAT", not "pretty good") Power Forward, you just have to see who's included in the "Greatest 50 NBA Players in NBA History" List.
That list includes a number of extremely overrated players, while overlooking others that were well deserving of such an honor. In my mind I've no doubt that for 5 Years, Kemp was a top 3 PF in the League, certainly not deserving all-time status, but we're refering to the 90's.