A particular favourite of mine is Roy Harper. Folk/singer-songwriter based stuff from a similar period (he's still around and touring) with some great songs. There's a bit of a range of styles covered but Valentine might be a good place to start for gentler acoustic stuff - he's a brilliant acoustic guitarist in the Davy Graham/Paul Simon mould and there are some lovely songs on this album. Stormcock is also worth a punt. It has only 4 songs but each is a bit of an epic with some great acoustic playing, poetic lyrics and interesting brass and string arrangements. Great headphone listening in the early hours!