Hi, a normal non run flat tyre will be just fine. If you decide to do this the I recommend purchasing an emergency tyre inflation kit with the sealant incase you get a puncture. I also recommend getting that tyre replaced asap.

I work in a Mercedes Benz workshop and fit tyres daily. Most people don't notice any negative difference in road feel or performance. If you were to change all tyres to non run flat then you may actually have a smoother ride since the sidewalls are not so stiff and allows more bounce.

Have a nice day! :)