I'm a HUGE reverb fan and to me the most versatile is an EHX Cathedral. Has spring, accutronics (6-spring verb), room, hall, plate, reverse, flerb (verb with flanger in the verb only) and even a dedicated echo mode with a echo/verb mix. Also it has tap tempo, a huge range of tone and damping, pre-delay of up to 2 sec, and infinite reverb on a footswitch or by putting the verb time knob all the way up. Can get very clean, can be dirty but not too much. Plus you can save 1 preset per mode (8 presets!)
I also got it with the tap tempo modded with a soft switch (really easy to do). It really makes it accurate and it also has a extra jack for a latching footswitch for the infinite (in essence a EHX Freeze)
I actually like it so much its currently getting re-housed and etched.
Best verb ever!
I also own a Roland RE-20 Space Echo (has a Z-Spring reverb: very select type of verb that you either love or hate.
And a MSLP cave reverb with damp and verb size controls. Gets really warm and cave like.
Typical EBOW,octave,fuzz,synth,poly-whammy,freeze-gliss,sample-reduce,MODE 7,flange-chorus,super phaser,FAT-filter,lo-fi delay,cave reverb,lo-fi looper,space echo,Chansey reverb/poke-freeze bassist