Putting BaKol and Tirza on the same “unusual names” line is pretty interesting… not really the same league :). I know plenty of Tirzas and I’ve never met a BaKol.
Nili is an acronym for Netzach Yisrael Lo Yeshaker, which is a beautiful sentiment, but if you’re Zionist it has an added significance of being the name of an underground Zionist movement in WWI (and if you’re not you may want to avoid it for that same reason). I love the name, probably wouldn’t actually use it, but that’s just me.
Just names I love off the top of my head: Avital, Moriah, Shalhevet, Ayala, Orli, Shlomit, Michal (not really uncommon though)