I like
Jaromil, Slavoj and
Antonie, but I doubt that they'd be too appreciated in Anglophone society. I love Antonín and
Roland, and I think they're usable.
Milan and
Milana are also lovely, and I know a Šárka and I can't help but think of it being the name of a sarcastic, vivacious, individualistic young woman. The mythological Šárka was a bit of a character too. Because of the similarity in sound to the English word 'shark', even though it's pretty, I don't think it's entirely usable without good reason or forethought.