Not sure if I'd really consider Rhodes's debut baroque pop either, mainly because it doesn't have the sort of ornate arrangements/instrumentation that I associate with the subgenre (could be wrong though- been awhile since I've heard it) but that's probably a more appropriate tag than power pop.
RYM tags the 3rd Big Star as "Pop Rock, Baroque Pop, Art Rock and Folk Pop" and I'd say the 1st and 3rd tags are probably most appropriate but like Nick says, the album really belongs alongside other "broken records" i.e. albums made my folks who clearly have mental health issues ("Oar",solo Syd etc).
On a good day, "Pretty Noose" is my favorite Soundgarden song so I agree that it's the main highlight on "Upside" but other singles "Blow Up The Outside World" and "Burden In My Hand" are also good and I also have an affection for the weird shit like "Applebite", "Boot Camp", "Ty Cobb", "Rhinosaur" and "Never Named". Other songs are less memorable but it's still solid if you dig their sound- was definitely a grower for me but then so was "Superunknown" TBH.
"I've actually never heard a single PJ Harvey song, but assumed she'd fit in that Alternative Rock category. "
Yeah the stuff after those first 2 albums isn't grunge and even labeling the first 2 as such is a stretch- wouldn't have thought of it without the RYM tags. But the angsty lyrics, gritty guitar sound and quiet verses/loud choruses format of the songs makes it somewhat appropriate. And I'd be surprised if you'd never at least heard "Down By The Water" (her biggest hit and one of the songs she sorta ripped off from Beefheart- in this case, "Zig Zag Wanderer") or seen the video back in the day:
"No Code" is both better and grungier than "Yield" IMO- the latter is basically a retreat to the corporate rock of "Ten" with more stripped down prodiuction.
"No on "Monster.""
LOL because it sucks or because it isn't grunge? Or both? As I've always said, it's kinda the REM album for folks who don't like REM som it suits me to a tee but it's another one that RYM dubbed grunge that I don't really agree with. Sorta has more of a glam vibe but then so do the 2nd and 3rd STP albums