Ghost packs so much sound shaping into a single module it's impressive. Delay, Reverb, Compression (with side chain), VCA, multiple distortions, multi-mode filter PLUS the effects chain can be reordered with a single button press. To be honest I added it here because I want one, and I think it'd be awesome for a small standalone system.
Admittedly separate modules for all of the above will have greater flexibility, but also at greater space and greater cost. None will provide the instant gratification of a single module that does them all simultaneously.
The fun thing about modular is figuring out what works best for each us personally
Common advice to everyone is to get a bigger case than you think you'll need. AND start slow. Get a few modules at a time. Use them for a while to learn what you'd like to add next.
Pam's, Plaits and headphone out is enough to start making noises