It really depends on how much time you have.

Yotel - need some sleep and just a few hours.
Park Inn Odayeri - 12 - 16 hours, want some decent sleep and relax (15 min taxi ride).
Egeli Butik Hotel - also close to airport but booked solid for next 8 - 10 months

The next closest one is Hampton Inn Kayasehir which is what I recommend if you have 18-24 hours, want some decent sleep and get immersed in local dining and shopping (some cafes and stores around the corner)

https://hamptoninn3.hilton.com/en/ho...BHX/index.html

You can also take airport bus that takes 30 min to get there.