This sounds like a weird mismatch but hear me out. I mean extreme metal bands (death or black metal) that have predominantly harmonized dual lead guitar riffs, you know, simultaneous lead guitar parts without another guitar playing chords in the background. I'd also appreciate if it keeps that hard rock feel instead of going full-on extreme metal with lots of tremolo and blast beats.

There's a couple of bands I can think of like this: Garden of Shadows, and early Ophthalamia to a degree. For albums there's In Flames - Lunar Strain, and Opeth - Orchid.