One button build

Thread necro time!

I’m gearing up a pet Conjurer, but have been getting to thinking of leveling up a new character on the side.

Specifically, a “one button” build of some kind, something where I’m the one hitting stuff, not just my pets doing it. I know it might technically be a 2-3 button build with a move skill, and perhaps a single debuff skill.
But just not a 3-4-5 button build. As close to a 1 button build as possible.

Now, in a perfect scenario:
It would be a build that would be super-duper tanky (via health regen, leech, defenses, or a combination of them). Passive or auto-proc defenses are welcome.
It would have decent enough clear to feel comfortable. Auto-RR is very much welcome.
It would also be able to eventually kill all the super bosses, without suddenly having to be a 4-5-6 button build.

At first I thought to maybe try a build with the Berserker mastery, but most of the ones I’ve looked at were fairly button-heavy. (I’m not really married to the berserker idea)
Then I thought to take it back to the roots, and look at a Nature Avenger’s Warder, but there’s been very little mention of builds with the set in the recent years, and the mention there is mostly talks about how it’s been left in the dust. Well, not horrible, but not really keeping up with the super bosses either.

I know that perhaps there isn’t such a thing, and I’d have to settle for a comfy one button build that can easily clear everything but super bosses.

There has previously been discussion of a Blitz warlord.
And various versions of Warders, Druids, even Commandos/Elementalists and stuff.

But perhaps there has been a build in the past year, or with the release of the new DLC that stands out above the rest for this purpose?

As an example, here’s a button-mashy looking ritualist build:
[1.3.0.0] (2H Melee) Ravager Reborn - Vitality Upheaval Ritualist [sr30-31] [cr200] [All Celestials] - Grim Dawn / Classes, Skills and Builds - Crate Entertainment Forum

It’d be cool to find something that’s as tanky (or preferably, even tankier), but with way fewer buttons to press.
Even if instead of killing the super bosses in 30-90 seconds, it takes 5-10 minutes of very safe smacking of the boss in the face with 1-2 buttons, I’d be good with that.

Any ideas or recommendations would be greatly appreciated.