Ugh. Someone invoked Raja Bell's name. I loved his fire, but his defense was even more overrated than Majerle's. I sometimes think anytime we get a player who plays with intensity automatically gets a "defender" label whether it's justified or not.
The best face-up defenders we've had weren't always noted for it when they were here. Kidd was a fantastic face-up defender. Guys that simply made their money putting out effort and grabbing rebounds were Ty Corbin and Mark West; West just didn't have the footwork to move his feet. Grant Hill, in spite of a reputation otherwise, is the best face-up defender the Suns have had at any position in the Nash era. I always felt Finley should have played the 3 because he was so strong and wouldn't usually give up that first step like he did against quicker 2s, but he definitely was decent at the 2. I think Gortat is decent but he gets exposed the moment he has to step out and guard at the top of the key and he can disappear when he needs to be weakside help.
Another guy I sort of roll my eyes at is Larry Nance. I LOVED Nance, but he was a pretty mediocre defender at the 4 and aged in a hurry by the time he got to play the 3. He got a ton of weakside blocks, but that's not everyday face-up defense. Neither is the gutter-growling, crotch-grabbing, elbow-brushing antics of Ainge and Bell. Great perimeter defenders force guys to either take jump shots they don't want to take or drive them into a low-post defender. There have been very, very few of those types in Phoenix since I started following the team in 1975.