In my heart or for real?

Cause I love werewolf class 😝 tank. Otherwise Sorc is just more fun.

Dk otherwise wins hands down. Can convert magicka to stamina. There's group shield and built in major valality. Tanking like passives on blocking and restinces. There is enflugling flames and other thing to give group more damage. Not to mention potion weapon damage buff. Also chains is refunded if failed but still gives speed buff in self and slow buff on enemy. Practical cc that is aoe instead of straight line...

Dk is just unbalanced as tank because can effectively do what other role supportive skills. Not to mention just plain tanky.

Dragonknight. Has been since the beginning, and I doubt that will change.

If the player behind the class is doing the job does class matter?

Better to ask, "Of you who are proficient tanks, which class do you prefer?"

From an endgame PvE perspective it's simply whichever class your group requires the most for the content you are doing. All classes can tank pretty much everything, some things might be tougher or easier depending on class, but that's it. If a group requires a certain class buff or a class that is particularly good with a buff/debuff set and would lose a lot of DPS by putting it on the other supports or a DPS the tank will usually go that route.

Let's take Asylum as an example. Usually you want the 8 full DPS to play the strongest class possible. That has been magNB for many patches now (only in AS). Some of the DPS will have to play Cros for the colossus. Now you need one Sorc for minor prophecy and one plar for minor sorcery neither of which are good DPS classes in AS at the moment. So many groups will try to put these classes on supports. Now in AS you have the issue that the Maintank and Frontkiter will often be out of range to apply these buffs to the group. So a group might put these classes on the Offtank and Grouphealer. Which is which would probably be decided by what the OT and GH have available, which sets they have and how well they can play.

Now you still have a few more things to sort out before you really can decide the classes of the MT and ***. There are a number of buffs/debuffs missing. Minor Vuln and minor toughness(lower priority) from Warden and Engulfing from DK are the most obvious ones without talking about sets. It would more likely be maintank DK then as he is always in range for Engulfing, but it's not impossible to do that on *** if they know what they are doing. Again the choice would be made based on the players. Now on top of all that you still need to fit in all the support sets and decide wether any DDS have to wear something of that which nowadays is pretty much a given with the wide breadth of sets available.

My point is that "best" depends on your goals. If you want to push scores than what I described might be interesting to you as you have to be flexible, but if you just want to survive the tankiest or easiest class might be best for you. Alternatively if you just want to have fun, then the class that does that for you would also be fine.

dk for most tankiness, necro for additional support to group and then warden also for additional group support but even less tankiness

But you have to admit there is at least a competition now. That has come a long ways.