As a quick one, to note the passing of the under-valued treasure that was Gary Sperazza! (I'm only basing this on his Bomp! Magazine input) I will just throw a list together that has been a life-long search TOTALLY inspired by his delineation of 1970s Hard Rock (in The Power Pop Periphery)...
When record shopping (and now, youtube searching etc) I always have that aesthetic in mind: Hard Rock With Pop Influences... Of the stuff he noted (April Wine, Artful Dodger, Piper, Starz, Bad Boy, Earthquake, Rabbit) a good chunk would, in time, be accepted as Power Pop by the powers that be and other curators.
Gary Sperrazza!: "Most of them (bands) are all extensions of the post-Glitter days with strong Deep Purple overtones. However, almost every single one of these bands manage to come up with at least one memorable record. "
The ones who leaned closer to Deep Purple were bands like Boston, Legs Diamond, Kiss, Aerosmith etc.
EDGAR WINTER GROUP