As to live performance reverbs…
The special offer on Blackhole has passed (it was only for two days), but I will admit to you right now - my secret sauce is to have Blackhole on almost every mix at the end. Often the presets are Blackhole, FishHole, Cargo Ship, Sigur Ros.
UltraReverb also gets a lot of use in shows: due to one of the “extra” presets that came included - “Lyle Mays Piano Verb” by ROCASound. Reverb.com also gives away a nice preset bank for it here.
KResearch’s fairly broken KR Space is used a lot for its ‘Bubble-marble-tunnel’ fairly early on specific lead instruments. You need to use the VST2 1.61 version that is included - his 1.7x VST3 version is not liked by any of my software. He has foolishly (IMHO) decided to only develop that for VST3 going forward, but version 1.61 works fine. KR Space incorporates a lot of motion with delays and is cool for its unique character.
I practically always have at least two (often three) reverbs going on in layers and one delay somewhere.
I also use ‘Diffuse’ and ‘Modnetics’ by Surreal Machines quite a lot. (Their “Dub Machines” bundle.)
I know this was probably a “One Reverb to Rule Them All” kind of request, Fred, but that doesn’t work for me. I wear my “Reverb Junkie” colors proudly!