Knowing where to find Fallout 76 power armor is largely luck. While there are set locations it can appear in, it's random - both in terms of if any is there, and as to what bits are on it.

In Fallout 76, the S-rank Power Armor includes Hellcat, T-65, Excavator, Union, X-01, and Vulcan. Ultracite, Raider, and Strangler Heart fall into the A-tier category.

Thorn Armor is going to be the best for Fallout 76’s Feral Ghouls/Melee Ghouls going forward, and I’m not the only one who thinks so. It tends to be the agreed-upon best pick.