It's an interesting question, but in my opinion, Jr. and Harden are completely different types from George and Siakam, and it's hard to directly compare who is better suited to a three-peat.
First, let's look at George and Siakam. George is an all-round player with excellent scoring ability and defensive ability, as well as a knack for organizing teams. Siakam, on the other hand, is a very scoring forward with excellent physical qualities and some defensive ability. The combination of these two players, which has both offense and defense, can be said to be a quite strong combination.
However, Cuba and Harden are another completely different type. He is a player known for his defense and scoring ability, but his strongest ability lies in playing in key moments. Harden, on the other hand, is a very scoring guard with excellent three-point shooting and breakaway ability. The combination of these two players can be said to be a score-based combination.
So, it's really hard to say who is better suited to a three-in-a-row. After all, basketball is a team sport, and the key to victory or defeat lies in the team's overall strength and cooperation. Whether it is the offensive and defensive combination of George and Siakam, or the scoring combination of Xiaoka and Harden, as long as they can work together, it is possible to help the team achieve the goal of three consecutive championships.