As has been mentioned… Reverb on a whole mix should be done very cautiously and with a lot of technical proficiency… It’s not something I’d do unless absolutely necessary. If you have access to a send bus and different channels live, or stems whilst mixing – then there are much more elegant ways of applying your 'verb.
In terms of good tools, you don’t need to spend tons these days, I wouldn’t worry yourself with a crazy expensive pedal.
Hardware, I don’t think anyone has suggested Source Audio Ventris yet… But it’s an absolute beast. Small form factor, really high quality, as deep as you want it to be. And it’s a dual reverb, either serial or parallel. I’ve relied on it heavily for years and don’t intend to change any time soon! Brilliant and well priced second hand.
In software, I’d second the rec for NI’s Raum. I use that and love it! Also, Seventh Heaven’s light version. Those two see me through anything needed itb and sound awesome. I don’t use any Valhalla except Supermassive a little bit (I find it ok but nothing more) but I’ve heard people get great results with the Valhalla Vintage Verb. And if you want to get spendy with plugins, the Fabfilter Pro R sounds excellent too.