You're on the right track with European varieties: they are typically not as voracious as Anerican varieties. In fact many commercial English hop farms utilize a low trellis system that more resembles a vineyard than a traditional hop yard. Goldings and Fuggles would be a great choice, just bear...
That's a TON of roast in your original recipe. I would consider backing down your roasted malts a bit and maybe adding some more 80-120 crystal malts. Are you wanting milk chocolate flavor or more bitter chocolate.