It all depends on the tanks/healers/dps.
Then you have to factor skill/knowledge.
Ultimately, each scenario will be unique and most people taking the “L2P” stance power leveled with a handful of people and/or only with FotM classes/specs because they can’t fathom a game outside of min/maxing the fun out of everything XD
An amazing healer can keep a bad tank alive, even a 2H tank.
An amazing tank can carry a bad healer (to an extent).
An average tank/healer combo can do amazing things with knowledge/skill/communication. (tank watching healer mana, pulling accordingly, etc)
It’s a game of variables and it’s about optimizing performance for the best possible experience for all players.
Default (imo) should be to start sword and board/DStance/etc and if you’re OVER tanky and/or healer is crushing it, then kick up the DPS if you want or pull a bit more aggressively.
Healers/Tanks need to be respectful with each other and work through it because 90% of the DPS is braindead XD