I can endorse Ubuntu as a font which is able to display lots of (european) characters. Maybe give this one a shot? If you test it with the Feature Peeker (floating around here in the forum) it seems to only fail in eastern languages. I do all my reading on it since I find it's really comfortable.
I've posted a little zip with (among others) ubuntu here:
https://www.mobileread.com/forums/sho...78&postcount=8
Or you may want to download them for yourself (just rename them as per the sticky posted by jacky_w) - here:
http://font.ubuntu.com/