I'm not sure what you mean by "too much like ELP from the 70's". Meaning it sounds like their version? That's probably because it's meant to be a cover of it, or at least an arrangement thereof. And no, it wasn't Tarkus. It was on ELP's debut album. Bear in mind that ELP's Barbarian was also an arrangement of Bela Bartok's piano piece "Allegro Barbaro"