EDIT: Forgot Divine Fury needed raging. So 4d6 + 32 without resources.

Level 8, Mountain Dwarf, Zealot.

First attack is 2d6 + 4 (str) +2 (weapon) + 10 (GWM) + 1d6 + 4 (Zealot) = 3d6 + 20  2d6 +16.

Second attack is 2d6 + 16.

If I rage, add another +4 and 1d6 + 4.

If I kill something, add a third attack at 2d6 + 16.

My to hit is only +4, but attacking with advantage due to reckless ensures most attacks will hit.

Well, you are expending resources -- the Zealot's Divine Fury only works if you rage. So not quite accurate ;)

Reckless is a great pair with GWM, improving your chance of hitting despite the -5 to attack. However, you are giving everything else advantage on attacking you, so hopefully you're not getting to reckless in a horde. So my advice: Avoid hordes!

Oh, good catch on the Divine Fury.

But if I'm raging, I have resistance to BSP damage (Plus poison from dwarf), so the advantage on attacking me isn't so bad. Especially with 93 HP.

I imagine at level 8 you must be fighting things that deal magical BSP damage, or other damage types? Careful with what your DM has up their sleeve... Might be lulling you into a false sense of security. I know that's my style as a DM. Let them find a great exploit for a while, but then the enemies find a different loophole, to keep you on your toes and out of a pattern. ;)

Quote from MellieDM >>

I imagine at level 8 you must be fighting things that deal magical BSP damage, or other damage types? Careful with what your DM has up their sleeve... Might be lulling you into a false sense of security. I know that's my style as a DM. Let them find a great exploit for a while, but then the enemies find a different loophole, to keep you on your toes and out of a pattern. ;)

 Raging Barbarian is still resistant to magical BSP damage. 

• You have resistance to bludgeoning, piercing, and slashing damage.

It does not specify non-magical damage only.

Zealots are fun. I have a 8th level scourge aasimar zealot with 17 STR and a silver Greataxe (low magic campaign). Before combat or in the first round he uses rage and radiant consumption (“I would like to Rage and Consume”) and does very reliable damage every turn. And if he doesn’t attack or get attacked in a turn it’s no problem because the radiant consumption damage to him (2 radiant) keeps the rage going. He always uses reckless attack.

(17 strength Greataxe) D12+3   + (Rage) 2   + (Divine Fury 1 creature /turn) 1d6+4   + (Radiant Consumption 1 creature/turn) 8 radiant   + (GWM) 10   + (2nd attack, gwm & rage damage) 1d12+15   + (Radiant Consumption end of turn) 4 Radiant   = 2d12+1d6+46.