The two I’ve been using most in my music for the past year are the Ibanez Ad-202 and Boss DD-500.
The AD-202 is just my favorite sounding delay ever. A lot of the time I’ll just use it to color an entire track, running it fully wet with a bit of modulation for some warble. I have my MS-20 sitting on top of it and they play so nicely together–heaps of gritty, dusty goodness.
The DD-500 is a bit of a pain to work with, but it’s worth it. I kind of understand why it isn’t more popular given the time consuming interface, but if you don’t mind sculpting a tone for a half hour or so, it’s capable of SO much. You can get more immediate results from it, too, but the I often find myself getting lost in messing with the EQ and modulation settings.
I’ve also been using my Reflex Liveloop module as a glitchy delay a lot lately. It does all sorts of weird stuff that I can’t even describe most of the time. I’ll usually just send a few tracks from a mix into it and set it up essentially randomly to give me some interesting background ambiance. The bit mangling that it does is so cool–sounds like whatever you’re running into it turned into server noise.