If the character is constantly making themselves so conspicuous, maybe they attract too much unwanted attention. Indirect confrontation #1 looks good in that regard. If he's the primary aggressor, showboating and whatnot, have the monsters concentrate all their attacks against him. Makes perfect sense to me.
Or if you don't mind being a little heavyhanded, you could design an encounter with some extremely powerful, intelligent monster or NPC. It could be a creature with mind control like an illithid, or maybe a powerful spell caster, or even a boss surrounded by enough minions to easily overpower the entire party. Have the boss/creature refrain from attacking the party outright, but instead just talk to them in a menacing tone. Maybe it orders them to carry out a quest or something. Then, when your loose cannon player predictably goes in for the attack (as you know he will), have the creature blithely assume control and put the character in a corner. Make the character sit there silently, unable to move or talk while the rest of the party deals with the situation.