In reply to cheek to the rock:
Gogarth is E1! Not sure many would give it HVS.
Scavenger is definitely best out of those mentioned thus far in my opinion.
Having put off climbing it for ages, I finally got around to climbing Concrete Chimney a few weeks back. Turns out it doesn't actually involve any chimneying, or concrete for that matter, and is excellent. I haven't done the link up yet but I reckon the Concrete Dream has got to be a contender for best HVS at Gogarth.