I certainly have no objections if you want to work on those profiles. As you have noticed I did propose the merges for Einar, but that's as far as I got.
If you have a look at the Wikipedia page for Heimskringla, there are external links to a couple of versions in English, which you could use as sources? Some of the people also undoubtably have Wikipedia articles themselves in English and Norwegian. I usually use Chrome as my web browser and it has a built in translator that does a reasonable job and often the foreign language articles have more detail or better sources are used.