Here is one where it is Black to move, but White to draw using underpromotions to save the game:
Best UnderPromotion Endgame Compilation
450 is an interesting study, but is that really the only way to draw?
The first 3 underpromotions are absolutely necessary, otherwise White gets mated quickly, however if Black varies on move 4 and plays 4...Qb3 then there are no more underpromotions necessary for the draw after 5.Ne7+ Kg5 6.b8=Q would be the move, or simply an immediate 5.b8=Q would work.
Found that study I was trying to find a few months ago. Can't annotate right now, but it's definitely the gold standard for underpromotions in my opinion.
I like how that one is so much more realistic than the still undefeated 8 knight promotions puzzle. It looks like a blitz game where white tried to ram the queenside with everything but got careless and let that e pawn through, or mouseslipped and forgot to to move the king to f1, but still managed to pull an obscure mate out of it lol
Here's one similar to the 8 Knight underpromotions, but with only 7.
White to move and mate in 7: