The divine quest continues!!
Bears: Brown, Cave, Great Hyperborean
Bears are good to have around. I wonder if the OSR's beloved "Just Use Bears" strategy is applicable to M&M --- to a certain extent, maybe, you can take one of the Bears as the baseline "burly monster" statblock, and add in one of the "modular" monster powers the Mazes & Minotaurs Maze Masters Guide has on offer.
But on the topic of proper bears in the context of Mazes: perhaps they take a second (or even third) place to such beasts as lions, wild bulls, boars.
The Compendium offers two "standard" types and a polar bear.