What are the most stealthy military jets the United States has developed? To some degree, it depends on what one counts as a military jet and what is counted as stealth. The upcoming high-end Collaborative Combat Aircraft, aka loyal wingman drones, like the Anduril YFQ-44 and General Atomics YFQ-42, could also fit the criteria at a stretch, but this list will limit itself to just manned fighter jets. This means large and secretive aircraft like the RQ-170 and RQ-180 are excluded.