Krieg Grenadier Trench Raider
 Veteran Build - Warhammer 40k: Darktide 

Grenade go boom. Bolter go boom. You get a boom, and YOU get a boom. EVERYONE GETS A BOOM.

Use krak grenades massed hordes of armored enemies like maulers. Only used the Grenadier perk for having the extra fourth grenade. You'd be surprised how often that one extra makes a difference. But if you don't want it feel free to move it around to another node you might need. I found that the shovel works best for hordes and light/unarmored enemies with wide sweeping attacks on heavy. Just spam lights or heavies as the situation requires. You can replace it with just about anything else you like. Serrated Blade is nice but for my build there's nothing I can really sacrifice. Save your Focus Target! for bosses and massed crushers. 

Using the Locke Mk IIb Spearhead Boltgun because the other mark isn't as nearly as useful for the intended purpose of killing heavies. Pinning Fire can be changed out to Shattering Impact for ultimate heavy kill, but it does reduce your effectiveness on other horde clear. 

Curio with stamina, sprint efficiency, and stamina regen is experimental. Feel free to replace it with anything else that suits your playstyle better. Infiltrate is also still experimental, the idea being you can run it kind of light a light Zealot with stealth to deal with lighter enemies, clear out lightly armored enemies and ragers, and use it as an emergency tool to res downed allies (which is why there's no revive speed on curios), but this is still experimental too. I haven't tested this on anything higher than Auric yet. 

Further testing: changing out Field Improvisation for Serrated Blade  to see if that improves melee. You won't lose out much on grenade regen the corruption clear has never really seemed that useful, but it will be better for the team. Your choice on that one. May move back to Voice of Command if the infiltrate strategy doesn't work out.

This is a fun build, not necessarily even close to meta.