Has anyone listened to this tribute album? I think I've seen it mentioned only once in this forum.
Here's a link to a YouTube playlist: https://www.youtube.com/playlist?list=PLF541E3046D235398
It was recorded live during a "goodbye" show from a band called Evil Bebos, where they played a bunch of Black Sabbath covers. The Protomen said they wanted to do something "equally badass" so they played a bunch of Queen covers.
I think it came out quite impressive. The Protomen have a lot more members than Queen (they're 9 people) so they had more people to do stuff that Queen wouldn't do live (the guitar harmonies in Killer Queen for example). The lead singer (Raul Panther) does a pretty good Freddie impression without sounding like an imitator, even hitting notes you normally wouldn't hear from live Freddie (most notably in Under Pressure). There's a few songs that Queen didn't have the opportunity to do live with Freddie too, like Princes of the Universe.
The only thing I think would bother the Queen purists is the use of vocoders and other synths (mostly because the selection of songs is more derivative of the 80s period), which people often cite as something that hurt the Queen sound a bit. I'm not that bothered because I'm used to it in The Protomen's own songs (it's actually part of the theme on their original albums).
Enchlore