Dirk wasn't considered the best in the world after 2011, and neither should Luka. He's firmly in the top 3 with Giannis and Joker though regardless of the outcome.
Tatum can definitely move up though if they win and he performs well.
It was the optics of the whole domestic situation that kept him from getting the job and having to be an assistant in the first place. I get it, but Lakers once again goofed on a coaching situation that could have rectified the Lue blunder.