Final shoutout to the early Digitech RDS
delays...nothing like LFO and CV control modulating an 8 second delay loop
Not sure about the other models, but the early RDS1900 used off-the-shelf CMOS logic and DRAM memory - no CPU, no software, just lots of old-school digital and analogue control. They're 8-bit, max delay just shy of 2 seconds. Lovely units. I have two. Dirt cheap and very much worth picking up.
As for reverb, I have an old Korg DRV-1000 - 8 presets types of 'verb, with 8 preset decay times, a hi-cut switch, and mono - but sometimes its dark, gritty sound is exactly what's needed.
Boss FRV-1 for spring reverb emulation in a pedal, and it's a good one too.
I have a Tantek Tanrak digital sampler/delay module - it's completely bonkers, and I haven't been able to tame it yet. Perhaps I shouldn't try. Knobs on the front for start/end points, CV control of pitch, loop/single trig, completely crazy. Wonderful.