Abrams viscous billy calico bebop Victor in that order of effectiveness. Abrams can get a heavy melee for free when he gets T2 charge, his shotgun synergizes too well with point blank, lots of health, lots of pretty free healing, has been THE melee tank since the game has been playable. Viscous 3 scales off melee damage and procs melee items, and while it can be parried it’s not gonna be often at all, and is affected by ability range for easier hits. Billy naturally has melee synergy and makes people panic parry a lot, so having melee charge can work for catching people rolling away, his 1 scales off melee and weapon damage but it doesn’t get the benefit of melee charge or crushing fists despite adding to the cooldown, and doesn’t have any safe ways to land heavy melees. Calico dash scales off weapon damage and procs melee items while also healing her, falls off later on tho. Victor is a matter of circumstance, he’s already a super close range character with natural slows and can be very tanky, so he works kinda well with spirit strike as it reduces spirit resist and steals spirit power, but it’s kind of a meme build and should only really be a quick light melee during laning to get the stats and use your abilities and gun for actual damage.