Cream - the original Power Trio.
My favorite band is RUSH - and in some metrics might be ranked as one of the “best” (whatever that means).
Here they are doing a cover of “Crossroads” using Cream’s version as their baseline. They did an entire album of cover songs of some of their boyhood idols and favorite songs growing up that influenced them.
https://www.youtube.com/watch?v=hh5vxPHvj1I
In their early years they would play covers at concerts because they didn’t have enough of their own songs. From the Who and even the Beatles! (”Bad Boy”)