Buster. 5th Gen is not just "stealth" so your statement is a little short of the whole truth. 5th Gen is taking multiple data sources from sensors both on and off the F-35 and fusing them to provide the best, correlated and "adjudicated" version of environmental truth that is possible. 5th Gen is also about networking that data, not just amongst other F-35 either. The stealth part simply makes the whole platform a lot less vulnerable and very pervasive as a threat to the enemy.
The information bit is often glossed over but given the anticipated confusion and cluttered nature of future warfare, knowing what's going on around you will dictate whether you live or die, succeed or fail.
PS - you're right about Typhoon and Growler etc. These have design and capability making them stronger in specific areas like sustained manoeuvre, acceleration and EW. Thus the important part is interoperability, or "5th/4th". This is where we are finding much synergy, commented upon recently during Ex ATLANTIC TRIDENT 17.