If you want to play that game, I'd say Drazen Petrovic for Walter Davis was a much worse trade. It looked good on paper at the time. Davis was a veteran scorer, that in spite of being 36 years old, was averaging 18.7 ppg on PER = 17.1 for Denver. Petrovic was getting almost no PT with Drexler, Ainge and Porter eating up all the backcourt minutes. So, adding a proven scorer off the bench to back up Kersey seemed like a good move. The Blazers also had the best record in the league and were in win now mode. Unfortunately, Davis never fit in and after a sub-par 32-game rental was back in Denver the next year where he, again, put up much better numbers than he did in Portland. And, of course, Drazen went on to become a lights out shooter who averaged over 20 ppg for NJN.
Ironically, the veteran Davis was brought in for a deep playoff push in place of the younger, inexperienced Petrovic, but it was Petrovic who averaged 24.3ppg for NJN the playoffs the following year - the season we lost to the Bulls in the finals. We sure could have used that extra scoring punch off the bench against Michael, Scottie and company as we saw our team scoring average drop by almost 15 ppg (compared to our regular season average) in that series