He was a proper decent footballer. Yes, he used to deliberately play the hardman and there's no defending some of his play - but he could pass a ball short or long, good finisher when called upon, could fill in at centre half, had a degree of footballing intelligence about him.
Leeds had a seriously good team at the time and their fans adored him.
Not making him out to be a magician but the consensus generally was that he was just a thug, like some roughneck you'd drag off the street and stick in a shirt. No, he was a good player as well as someone who did undoubtedly go too far sometimes.
Hence underrated.