my little girl has eczema too and I have tried just about everything under the sun!
I am now using a product called 'DermaVeen', both the wash (for her scalp) and the mositurising lotion, and it has worked a treat! Her eczema has pretty much cleared up (all the nasty looking patches anyway) and her crusty cradle cap has disappeared. DermaVeen doesn't contain any fragrance, parabens or lanolin. I just bought it at a pharmacy (not all have it tho), the pharmacist recommended it.
I have also cut back on eggs, milk and cheese (cos I am breastfeeding) so that might also have made a difference.
good luck and hope you find something that works for you