Personally I would set the Release Group and Vinyl release as what you see on Discogs. Regarding the Digital release there is more debate since there is the official website. I tend to prefer prioritize guidelines and Physical medias as the data from digital source are not persistent in time (could change when website revamped) and de facto are not reviewed with the same professionalism as the ones from Physical resources (easy to imagine someone saying “Hey, it s OK, nobody cares about that and if the artist complain we can still fix it later”).
Concensus is to rely on " / " and only crediting the main Artists/Titles, this to avoid the “messy” part as you’re pointing (for instance feat. or acc. artists won’t appear on release, only on tracks)