As I understand it the meta for Stamina builds is DW/Bow. Im not sure how much the dps difference with 2H/Bow is though.

There is this StamSorc build by Alcast for 2H/Bow, but he does say its for dungeons rather than trials: https://alcasthq.com/eso-stamina-sorcerer-2h-build-pve/

2-Hander Melee builds are excellent in PVP, thanks to good burst damage options, a gap closer, and self-heals with Rally.

For PVE, its true that DW/Bow is the meta forDDs because those have superior DOT, single target, and damage mitigation skills.

Healers are able to go resto/destro now that they don't have to use one-hand and shield or dual wield to get two full set pieces and a monster helm. Since healers often use elemental drain, destro makes more sense now to pair with resto.

In short, the meta is restrictive because that's the most efficient way to complete content. Most content can be completed with less-than-efficient builds.

So as long as you can complete the content and have sufficient DPS with your two-handed melee build, go for it. (I'd still advise having a bow back-bar because those DOTs are huge for DPS and there are some fights best done with ranged options.)

I know 2H is popular in PvP and thus PvP builds. I think Summerset help solve 2H's (and bow's) biggest problem which is that of a spammable skill, but now we have Crushing Weapon. That alone helps quite a bit.

As for the resto/destro bars on healers... Destro staffs provide a great AoE DoT with Elemental Blockade; as well as Elemental Drain, which is a great sustain group buff for both the healer and others. That's why they are so popular with healers and you don't see much variation. That, and that Restoration and Destruction staffs are the only two magicka weapons in the game and damage scales off of it's resource pool. That's why you won't see a healer rock a restoration staff and a bow on the back bar, the bow doesn't make sense as: 1) Bow literally has no skills that are useful to a healer. 2) The bow's damage is severely limited if the Healer has the majority of his/her attribute points into magicka.

As for meta builds, there are plenty of players who use non-meta builds and are effective, many simply don't post them for a variety of reasons. Also, veteran endgame content (such as Veteran HM Trials) can be very challenging (as they should be) and everything hits a lot harder and there is a lot less room for mistakes. As for tanks, there is a very limited amount of options for taunts, in fact there are only 3 ways (not counting sets) to taunt: puncture (1h and shield), inner fire (undaunted), and a HA from an Ice Staff with the Tri-Focus passive. Puncture doesn't just taunt, if pierce armor morph is taken, it also applies major fracture and major breach, which is a huge help to DPS. As far as I know, there is no poison that applies both breach and fracture. This is not even getting into 1H and Shield's passives and Absorb Magic skill that are life savers for Tanks.

DPS is by far the most flexible class in terms of unique builds, as long as you can hit around 25k DPS, you should be good to go for the vast majority of the content on ESO. Tanks and Healers flexibility comes not from their weapon choices, but the skills they utilize in their free slots. I do have a 2H tank, and he's pretty great, but I also have a lot of points invested in 1H and Shield, because I know there is just some content that 2H is just not going to cut it for me to fulfill my role well enough to help my group mates.

TL;DR: There is flexibility within ESO, particularly with DPS. However there is content, particularly veteran HM trials/DLC dungeons, in which more "traditional" choices are required in order to be an effective group member and carry your weight.

Truth is if you want carbon copy builds go stamina and just put on DW and Bow

If you want something different go magik you will use a few destro abilities but you will use more class abilities making each build more unique

Anyone have any thoughts on a 2H/-something DPS Warden? 2H/Bow or even 2H/DW?

I notice all of the posters thus far reference Sorcerer, and I see that Sorcerer has a passive boosting physical damage. But I'm wondering what other classes in a 2H setup might be able to bring.

Automaton + hundings rage with pretty much any other class aside from sorc.