For certain, Fennec Shand and Cobb Vanth (Timothy Olyphant) for crucial story points.
Personally, I think this is the end for Djarin, and I believe that with his mission concluded, The Mandalorian Season 3 simply shifts to be The Book of Boba Fett, with a completely new direction that can still use many of the characters who have been introduced throughout the first two seasons of The Mandalorian.