D'Aulaire's is the most well-known, and I like it. It's a bit cleaned up for kids, but it might be a bit too violent for a really sensitive young child. If fairy tales are too scary, D'Aulaire's myths are probably too scary. Our library has a great version of this one with lovely artwork that I like. It's the one I read to my Viking enrichment classes.
The other popular one that I've seen used a lot is the Osborne one. I haven't read that one, so I don't know how it would be for sensitive readers, just in case that's a concern.
Those would be the two I'd look for.
