Are there any Demon Hunter guilds?

[Hungarø-argent-dawn (Hungarø)]

Highblood Myrmidons is a Horde militaristic guild with a slightly less rigid tone.

They do have many DH but they are not neutral.

[PCU] Horde Elf RP - Highblood Myrmidons

The Highblood Myrmidons’ doctrine is based around the idea that the Horde now stands as the logical continuation of the elven empires of old, having recruited the two high-blooded mage cities of Silvermoon and Suramar to their cause. The Horde provides the strength and backing that is needed to achieve the goal of Highborne dominance, being an excellent tool, as well as coming to both Suramar and Quel’Thalas in their ultimate times of need. Characterised by an undying, sometimes fanatic loyalty…