On the suns I’d say Booker is clearly the biggest complainer, but Nurkic does it too. KD and Beal honestly don’t do it much…KD will talk to refs in game, but he’s generally pretty good about turning the focus back on the team. Vogel complains about the refs a lot. Monty Williams complained a lot about the refs. So did CP3.
I never see people bring up Anthony Edwards, but he complains to the refs a lot too. Just about every scorer will complain.