You'll need to look for sites that are aimed at adults- the kind that want age verification. If you search for one in whatever genre you like you should be able to find some. Anywhere that is going for a general public market is going to have at least the same posting guides as dA, many are stricter.
I don't think Deviant have that many rules about posting !! When you can upload nude girls and guys , I don't think you need anything else unless you want to upload some dead people or abusive pictures !!