I recommend Hasan's place! It's small, but it has everything you need, equipped kitchen, comfortable bed, and clean bathroom. WiFI also was good. Walking distance to Osmanbey Metro, and there is a grocery store with many fruits nearby. Bedroom has an electric heater, I think good enough for the winter.
Some things to note are that finding the place can be hard, go up the first set of stairs but avoid second set of stairs up, instead look right and take stairs down. Sometimes you can hear water in the walls, but it's not a big issue it's generally quiet and good thing is no noise from mosques.
Thanks Hasan!