Comment by bigyabai

The F-16 is cheap, attritable, highly available, and occupies a similar multirole mission profile as the F-35. It should be able to launch the same standoff munitions, albeit from a slightly further distance to avoid detection. It's likely they can be bought secondhand for ~1/10th the price of an F-35 and equipped with MBDA Meteor/IRIS missiles for a mean air patrol payload.

More realistically though, I'd imagine many European nations are eying twin-engine multirole fighters like the Rafale and Eurofighter. These have a larger range and payload than the F-35, bigger radars and pylons and the all-important high top-speed (mach-2 intercepts are a must-have bordering Russia). These can be had cheaper than the F-35 and are generally better suited to a high intensity inland conflict.