Ahhh - reverb. Tons of good choices these days. In the loop or after distortion almost always the right choice! The biggest issue, IMO, is do you have a favorite and just want some "on all the time or occasionally". Or are you really digging deep for just the right "ambiance' from track to track....
Some thoughts - and I am by no means up on the latest/greatest....
#1 The TC Hall Of Fame in full size or mini seems to be a no-brainer these days, especially with tone print. Full disclosure - never used it, but have heard it. Too much good press on all of those TC boxes to ignore.
#2 A personal fave of mine: Boss RV-3 Reverb/Delay. A few reverbs, and a Delay, and reverb + delay! An oldie but a goody! Delay Reverb combo can be epic/awesome. Or just go for room/plate/hall...
#3 For basic set & forget reverb - I am a huge fan of the Uber-organic stylings of the EHX Holy Grail, or even better the Holy Grail Plus. These come in 'nano' size these days - meaning regular pedal size to most people. Great option for just plain old amp style spring - which is actually a lot of the reverb we all know/love anyway....
#4 Hard to hate on the Line6 Verbzilla. It's the Swiss Army box of Reverbs.