Well, stealth is part of the definition of 5th gen, so the F-35 is kind of the only one in production. The Chinese and Russian equivalents are rumoured to be not actually that stealthy.

Ignoring the "generations", Gripen vs. F-35 is an apples-to-oranges comparison; they follow totally different philosophies.

Gripens are designed to be a workable fighter jet, while being operable out of an improvised runway with a small, untrained ground crew. It has air intakes that are resistant to swallowing rocks and only needs 500m to take off, for example. Notably, Sweden was preparing to slow down an invasion by a neighboring superior force with it until their allies could arrive, and that's reminiscent of our situation now.

Meanwhile, F-35s are designed for general air operations in a large military, while being stealthy. They managed very impressively few sacrifices on maintainability and performance to get that stealth, but it still needs a massive supply chain to run. You're not launching it from somewhere in the bush. I'm not even sure if a standard airport will cut it. Stealth is nice, though, for obvious reasons.

They both are NATO compliant and have network-centric warfare capabilities