Ahoy, Mogwai!
I totally agree, Cable should have been massive (also, they should reform!).
I did check out Compulsion's 'Future is Medium' because of rave reviews and a lot of people saying that they were underrated and whatever and I've gotta say that I enjoyed it but I didn't think it was that great. Don't get me wrong, Future is Medium wasn't bad at all, just not as good as the hype had me believe. Having said that, I'm gonna go put Future is Medium on now and have another listen! Maybe I started in the wrong place with Future is Medium? Do you recommend any of Compulsion's other stuff?
As for Done Lying Down, I've never heard of them so I will go and check them out and report back!
I would like to add to your list of cruelly underrated bands, if I may, China Drum (later 'The Drum'). Their first two albums were good, solid power-pop, but their last album ('Diskin') was a masterpiece which should have brought them much fame!
Thanks, dude,
Corporate_Automaton