Ah Teron Gorefiend. Once a respected Shadowmoon shaman named "Teron'gor" he joined Gul'dan and became a warlock IRONICALLY because he couldn't fix the problems Draenor was having using Shamanism... the problems he didn't know were actually caused by Gul'dan.
The AU version was fat and gross and ate souls but the MU version was... still a genocidal war criminal and got murdered by Orgrim before being stuffed into a dead Stormwind knight, becoming a WC2 Deathknight but was actually more loyal to Orgrim (the guy who KILLED him) and the Horde than Gul'dan. Even coming up with the plan after the Horde lost the second war to have the Horde escape their dying world not through conquering Azeroth but finding some empty world to settle on that wasn't dying... or admittedly just one that was weak enough not to kick them out.
Sure this ended up with Ner'zhul pulling the planet apart, and Teron getting imprisoned by a bunch of Draenei... BUT after being freed by the player he shacked up with the Illidari who enslaved and murdered plenty of Broken, before being murdered again, so if we can work with them, why can't we work with Teron and see him rejoin the Horde?
He's classy... https://wow.gamepedia.com/Teron%27s_Gold_Coin
He's a good horde tie to Shadowlands
And more than anything else, despite essentially being an evil genocidal monster he's always been loyal to the Horde and was originally a good person before taking up fel magic thinking it would help his people. Plus he's an orc in a human body making him a good bridge between the Orcs and the Forsaken.
Let's find him in the Maw and let him loose or something.