I believe it's Davis.
Here's why
Rim protector - check
Commands double team - check
Pick & Roll with IT - check
Rebounding to help Horford - check
Already under contract - check
Davis will dominate the East - check
He attracts talent - check
The Pelicans roster is bare...nothing there besides Cousins and Davis. Holiday is gone. Playing twin towers in the West does nothing for them because they can't beat the Warriors or Spurs playing that big. They can remake their team with young players.
PG13-would have to agree to an extension -

Butler-he isn't worth all of this movement