Any of the 5 main US Doctors for LL (Paley, Rozbruch, Mahboubian, Assayag, Penardishad) will be top tier compared to non-US doctors. That being said, Paley is the near unanimous choice for the “best”. To some extent, if money is not a factor, I would say the choice here comes down to which city you want to stay in.
Outside of the US, Lee is as good as it gets but be aware of the long waitlist.
If you’re going to do 2+2, you might as well do 3+2. People here will over analyze and talk about proportions, but at your starting height height is far more important than proportions, imo. I think the concern for proportions is more justified if you’re 5’ 10” or something due to diminishing returns.