The kind of cream to choose for dermatitis/eczema really depends on what type it is and how bad it is. I have severe contact dermatitis that got worse when I started showing an allergic reaction to mold in our house. Getting rid of mold is not easy, especially since our basement is full of it and it will take some time to clear out entirely.
Meanwhile, my dermatitis has gotten extremely bad, my face and arms especially have an itchy rash, a lot of flaking and dryness. I can't seem to use any kind of normal moisturizer because it just makes the rash and itch worse and burns like crazy. My doctor has prescribed a strong topical steroid cream which I will use for two weeks and then we will probably switch to over-the counter hydrocortisone creams.
I've actually heard that using steroid creams for a long time is not good, but I don't really have a choice since my condition is so bad. But I will probably stop using all hydrocortisone creams in a month at most and switch over to regular moisturizers with vaseline.