America - sound like every other band in the genre.
Bachman-Turner Overdrive - legit nominee
Blood, Sweat, & Tears - legit nominee
Joe Cocker - who’d he influence?
Grand Funk Railroad - legit nominee
The Guess Who - popular but influential?
Iron Butterfly - I love them but they’re one song
Jethro Tull - legit nominee
The Amboy Dukes/Ted Nugent - not as influential as Frampton but a contender.
Steppenwolf - two songs
Three Dog Night - super popular but influential?
None of these omissions are as criminal as Iron Maiden.
Hard to comment on this on my phone at metal bar at moment, but Iron Maiden and several others you mention are legitimate, even some you didn’t agree with. I’ll be seeing Maiden in September.
I’d be even more brutal than that. Basically, no one on that list deserves to be in.
Better list:
Warren Zevon
The Replacements
Joy Division/New Order
Motorhead
Pixies
Brian Eno
J Geils Band
Harry Nilsson
Wilco