King Arthur's adoptive brother Kay in Arthurian Legends.
If Little John isn't described that way, Friar Tuck will be. Occasionally Robin himself.
Several thunder gods fall into this trope. Thor, Perun, and Susano no Mikoto fit the mold very well. Zeus is a Boisterous Bruiser that got married — I mean, his idea of subtlety is turning his paramour into a conspicuous white heifer. Thunder gods that are also the head of their pantheon tend to have been Boisterous Bruisers before they obtained some kind of (frequently literal) font of wisdom.
In Norse Mythology, in addition to Thor, Aegir has a bit of this too. He lives in a giant feasthall at the bottom of the sea and spends all his time entertaining the souls of drowned sailors.
Sharik from the Russian fairytale. His sister was abducted by a dragon, and her other brothers went to him first, trying to get her back. Said dragon lives in a big house that awes the brothers, serves them "food" of brass and iron which they can't eat naturally and "offers" them to give the sister back if they manage to destroy a huge log without either axe or fire. Which they can't, naturally, so he kills them. Enter Sharik, who mocks the "poor hut" of the dragon, eats all of the "food" and complains he doesn't get more, destroys the log with his little finger and his breath, then kills the dragon and revives the other brothers. Happy Ending.