Nothing beats Hellsing Ultimate for me in this regard.
While the show isn’t in general all that gory, there’s this one scene in the old Bastard!! OAV (the 1990s one) where the MC (as a friend of mine put it) juices a hydra, which has got to have the highest blood-produced-to-creatures-killed ratio of any anime I’ve ever seen.
zabadoh@ani.social 7 months ago
The following couple of sakuga gore scenes in Megazone 23, Part 2 www.youtube.com/watch?v=4q2THtU2g_o&t=13m11s
The rest of the video is nowhere near as gory