On the older Kindles, K4 and back, it is possible to add a substitute font to the Kindle device itself. We had at least a few threads where people showed screenshots of their substituted fonts. If you can search and find those threads they might be a very good source as you can see how they will actually look on a Kindle. I wish I could remember which threads and where they are located, the exact Kindle forum on MR, but you should be able to search and find them.
There will be a lot of talk about how to do the hack, but you can page past all that and look at the attached screenshots.
EDIT: I think this might be one of those threads