Kenyon Martin Jr.
Back to players that provide more funtional size, Kenyon Martin Jr. would be a nice addition in that department. Martin Jr. is listed at 6'6 and 215 pounds; someone that can play either of the foward positions as well as shooting guard. There is more versatility on both ends here, which is something that became an intriguing part of Caleb Martin's game.
Martin Jr.'s best season came with the Houston Rockets back in the 2022-2023 campaign. He posted numbers of 12.7 points, 5.5 rebounds and 1.5 assists on 56.9% shooting that year. However, he is not the best shooter from long range, sporting a career percentage of 33.7%.
He is the most raw offensive player out of this list being at the age of 23, so improvements on that end of the floor could always take place especially in the Heat's system. But his potential is even more promising on the defensive end. He is capabale of being a strong one-on-one defender, and has the size and length to be a threat on that end against perimter players.