I voted for Crystal simply because their intros remain in my head (Some were just crystal cracked etc..) but the good ones like the bouncy rabbit etc.. were great.
Fairlight come in close behind (a tough choice!) their cracks were top notch, and they released ALOT of the stuff 1993-1995
As for the others Skid Row were quite memorable and were the first cracking group I remember, as for others Paradox were okay and quite similar to Crystal I suppose (in intro design etc..)