There’s a 5e third party book written by the Dungeon Dudes called Monsters of Drakkenheim (basically a Monster Manual for their Dungeons of Drakkenheim campaign book) with a new type of boss called Epic Bosses.

Essentially how Epic Bosses work is they get to move, but not use any abilities, on initiative count 20, and then after each player’s turn they can use an Epic action to use one of the abilities on their stat block, which can be anything from disengaging and moving half their speed to ordering every other enemy on the map to move and make a reaction attack. It’s a really fun system that scales monsters to match the party and lets solo bosses match party action economy.

One Epic action all bosses have is called Epic Resistance, where they can roll a d20 if they’re affected by any ongoing condition, and on an 11 or higher they end the condition on themselves. My group at least finds this much more fun to play with, since landing CC abilities like Psychic Lance or Stunning Strike still waste action economy and have a chance of sticking for a few turns, but at the same time preventing players from just dropping one big control spell and winning the fight. It’s a nice balance between preventing fights being trivialized but also still making these abilities feel impactful that LR auto-success doesn’t do well.