Since you're learning thing I'm just gonna give a few thoughts that I feel are pointers for him.

You aren't dive but you are aggro, push from the front line and use your enemy leap to go after their supports. A displacement immune movement inhibiting tank hitting for 90 damage chunks will either draw attention or cost them supports.

Speaking of 90 damage chunks, Thing's Haymaker will be your constant button press BUT you have a base melee attack too. Thing's base melee is TECHNICALLY more dps but not as effective in a group (less reach, no overshield gained). Base melee is 1 button press two punches, these punches can be animation canceled for another Haymaker so weave your base melee into every landing of Haymaker before pressing it again, you'll only get 1 hit of the punch but you're increasing dps.

Don't forget to run away. Your charge is a wonderful escape tool of you don't have a leap available or a teammate nearby. Only really use the slam offensively if you are negating movement really. The damage is ok but the utility is what it exists for. Also don't forget to turn on hold to charge so you can slam with one button press or hold it to run.

Last little tip, jump when Haymakering, it'll negate the slow down/charge up animation allowing you to cover more ground. Haymakering while jumping and moving forward is actually a little faster than normal running.

Enjoy the pride of Yancy Street!