Prime Shaq was the best player I saw post Jordan. Duncan however had a much longer prime, was more consistent and well rounded, and took care of himself.
Duncan gets overlooked because he was fundamental and played in San Antonio. I remember people used to argue KG was better than Duncan just cause KG was flashy and Duncan wasn't. Meanwhile Duncan kept winning titles and showing up when the games meant the most unlike KG.
True, and KG wasn't as great as Duncan, but KG is right beside Duncan is being the least appreciated superstar of his era. How different life might have been if he was in L.A.
Compare KG and Kobe. Kobe fit that wingman profile marketed so fervently by the NBA that
@gspieler mentioned, played in silver spoon L.A., was a volume scorer, and so he was showered with all the love. It didn't help that KG was an asshole, but so was Kobe. If KG had been in L.A. with Shaq, the rigged whistles, and the piles of cash instead of the ice bums he would have been the one with 5 rings.
Compare the Laker's glory years. Kobe scores a bit more with roughly equal efficiency, but pulls fewer than half the rebounds, dishes equal assists despite that he's a guard with a higher usage, LOL, notches 1/3rd the blocks, picks about the same number of pockets, turns the ball over more, fouls more, isn't a DPOY vote leader every year, and is worse in every major advanced metric (Win Shares, BPM, VORP):
KG vs. Kobe (1999-2004)
Now go ahead and look at the three years following that, before KG moved to Boston, and before Kobe got Pau. The hard carry years for each. Kobe scores yet more, while everything else remains the same, but not strapped to Shaq's back, playing like any other superstar in a small market, which is what Garnett did his whole career before moving to Boston, what's the key difference? No more rings. He puts up 111 wins in LA while KG puts up 109 in Minnesota.
KG vs. Kobe (2005-2007)
There's no reason to believe that Kobe wouldn't have been equally obscure if in KG's shoes during his early career. Everybody was so desperate for there to be a Michael 2.0, because Kobe stylistically was the closest thing, it didn't matter that Kobe was no Jordan. It's no different than feudal kings and their sons. It doesn't matter if the prince can't fill his dad's crown. He's gonna wear it, anyway.