The early Spock's Beard albums have their Gentle Giant-like moments and at times Gnidrolog sort of do too. At the end of the day though GG are pretty damned unique.
For Gryphon I love Red Queen, Raindance and Treason but the first two - which I paid too much for as Jap mini-sleeves - are hard to take in a Amazing Blondel kinda way. To me it just isn't rock.