Some are clearly much more synergistic, but none of the classes will clash with the warforged traits. Muti Ability Dependent (MAD) classes could possibly be significantly less optimal, though the elevated survivability from the CON boost makes up for it. A firbolg cleric fits the race’s Strength and Wisdom scores, https://felixslewm.humor-blog.com/27569134/the-single-best-strategy-to-use-for-kobold-height-5e