For me, based on more than 15 years of PC building experience:
Tier 1 : ASUS, MSI, Gigabyte, eVGA, XFX
Tier 2 : Sapphire, KFA2/Galax
Tier 3 : PowerColor, Zotac, HIS
Unknown a.k.a. I have never used and have no experience: Gainward, Palit, Club 3D
Note:
Except for Powercolor, I have no real bad experiences for all of those brands.