God.. It's so great how many of you cite Ray Shulman of GENTLE GIANT. I always loved his violin playing on those records, too. Some really fine harmony singing/songwriting on those old GG albums, something I find other prog to be lacking sometimes (not that I'm an expert). So... who these days is putting out music like that? I'm trusting fellow TB'ers to turn me on to new stuff.
Oh, would Colin Moulding from XTC count? Maybe not prog, but great stuff nonetheless... One of my personal favorites, along with Bruce Thomas (definitely NOT prog!).