A more serious answer would be that I don’t believe there are actually any bad reverts anymore. Freebies and those that come with DAW are often all that is necessary.
From there, you can start to demo and make choices based on different factors e.g workflow, features and specific types of sounds. However, don’t forget to brush up on certain reverb techniques and learning to leverage compression and EQ to bend ‘verbs to your will.
For specific recommendations the Valhalla offerings are great value and don’t skimp on quality. Also the aforementioned Nimbus/R4 is a solid combo, that’ll often be seen at no-brainer prices. The only downside is it’s still a little unclear how these plugins will fit into Izotope’s new subscription model. I don’t own any of the above, but was impressed when demoing.
Either use the reverbs you already have in your DAW (all the major DAWs have very usable reverbs), pick up Valhalla Room for $50, or wait until R4 goes on sale again for $30 or less at PluginBoutique. I picked it up for $29 a couple of months ago.