I'm afraid your wall is going to end up looking like Mickey Mouse.

I'd either:

1. Move the pendents much farther out to the sides. Or, if you don't want to move electric,

2. Get a narrower rectangular mirror.

This company makes cool pendants that would go with other elements in this bathroom.

https://www.cxny.com/products/fixture_types/single_pendants

Lots of shapes and colors.

Those are beautiful!

Clear glass will also be hard to keep clean.

IMO the pendants are all wrong for the space and as they are way too close to the mirror and honestly provide no light where you need it . I would do 2 LED wafer ceiling lights and be done no way do pendants work in that space unless moved way out from the mirror.