More Aggro for Fighters

I really like playing as a fighter. When I play with my friends we all take different roles, and I really enjoy being a tank. But often times when we challenge bosses, they deal more damage than me as rangers and mages, and it results in the boss growing disinterested in me and targeting them. I know that there are mechanics built in already to help with this. BUT the mechanics in game that make you draw aggro feel kinda okay at best. There's a trinket that can help draw aggro, but then you waste the trinket slot because there's only one slot. Then there are shields, which are nice, but I really prefer a two-handed playstyle.

Something along the lines of a mutation that draws enemies to you, a bonus to a complete fighter set granting more aggro, or maybe even adding a second trinket slot so I can put on the trinket I want for combat AND the aggro trinket. I would really like more options like this, and I'd be super grateful if something like this were considered.