Harden is a point guard. Should be him vs CP3 for 2nd team.
Giannis vs Duncan isn't really tricky since 90% of Duncan's career still happened after 1999, and he's viewed as someone in the top 5-7 GOAT conversation.
Jokic vs Shaq is more "interesting" since we're omitting the better half of Shaq's career ('92-'99). So basically Shaq's 4 title seasons vs Jokic's 6 to 7 great to monsterous individual seasons
Dirk over Garnett is interesting as well, but i get it. The early 00s was basically a 2-man debate between Duncan vs KG. Duncan basically left him in the dust and then Dirk sneakily got in the convo for #2 without there ever being a direct ongoing comparison with KG like there was with KG/Duncan. Dirk vs KG seemed to pick up only happen after 2011... since the stigma on Dirk was he was a p*ssy, until he wasn't (2011) and then you had to reframe the entire narrative about him.