Having now read TSM:
Tress of the Emerald Sea. Princess Bride parody with aethers and quality Hoid narration? Obvious pick.
The Sunlit Man. Fun, plus a lot of nice Cosmere tidbits.
The Frugal Wizard's Handbook for Surviving in Medieval England. I really liked it, but the ending fell flat for me. Still, I'm a sucker for Anglo-Saxons.
Yumi and the Nightmare Painter. Don't get me wrong, I loved this book, but romance isn't my thing. The jokes were still funny, though.