Out of all the effects, reverbs and compression seem to be the most controversial. It’s all a matter of personal taste. Many of the Cubase versions can be shaped pretty diversely. I’m using only one 3rd party reverb but just for certain applications. I use Roomworks for most of my vocal flavorings. I’m only on CB Studio 5 so I haven’t even experienced REVerence or feel the need to at this point. I can shape what I have to suit anything I do.
Compression is also a matter of taste. A lot of them function well for compression but have different sound signatures. Take your pick. You have to experience them yourself and make your own personal choice. Someone else can tell you something sounds great and you might like differently.