Ohhh, the dejavu is looking really good on my big Oasis. I don't find it too bold, but I do have to turn down the boldness. I usually read boldness on #2 when using bookerly and on 0 or #1, dejavu looks about the same as bookerly on #2.
I can also use the same #4 size on dejavu as I do on bookerly, but for the others I tried, I'd have to go to #5, which is then a tad too large for me.
Thanks everyone that has been posting these fonts. For someone like me that never did any fiddling with her kindles and would not have had any idea where to start and what are good fonts, it has been very helpful.
I am going to read further with dejavu for now, its pretty.