Is that really an artist credit? I don't see that as crediting the album to "Sonic the Hedgehog", I see that as just branding the album as being part of the franchise -- somewhere between a label and a series, though not close enough to make me want to put it in either field. If we were to go with anything, I'd agree that "Sonic Team" is the best AC given that one image, but unless some other page credits them more directly the "Various Artists" should be perfectly fine. As a note to everyone else, @pomparapekoluna has already added the release, if anyone wants to copy over the VGMdb info. I'll probably get to it eventally, but it's not one of my priorities at the moment.
Oh, and @pomparapekoluna, since you have the physical disk, it might be nice if you could add scans of at least the back (since that's not on the other sites) and the front (to match), and preferably the booklet as well.
EDIT: Well, it is on the VGMdb page, I just can't figure out how to get it big enough to actually be able to make anything out.