The closest (other than the strip in Ronda, which I've never heard of) would be Villamartin. TORA around 500 - 550 meters, if memory serves. Only problem there would be the lack of infrastructure, i.e. car hire. Next best LEJR, Jerez. All the mod cons, BUT BEWARE all AENA airports have recently hiked their landing charges and many (most/all) are now also mandatory handling. LEBA (Cordoba) is still OK and a nice place to fly to. Not very close to Ronda, though.