And we must not ommit Ozon/Rombi.
So much great music from that partnership!
And of course Shyamalan/Newton Howard.
And Miyasaki/Hisaishi and Kitano/Hisaishi.
Edwards/Mancini.
But none of these underrated, I would say. All highly acclaimed.
But I could also name some overrated ones:
Abbrams/Giacchino
Nolan/Zimmer
By the way, as Shore scored all six LotR movies does Peter Jackson / Howard Shore count in this category?
John Williams and Chris Columbus had 4 1/2 together.