Flightaware has something you might like
From the main page at flightaware.com, you can pull down the "live flight tracking" menu and pick "browse by aircraft type." There, in order of the number of each aircraft type, is a count of aircraft currently "in the system" covering most of the globe. Some countries dont participate and many VFRs not "in." Scroll down to see more GA aircraft types. Always a few RVs, seems like mostly 7 and 10s. (You can ctrl-F search for "RV" and get all models.)
Amazes me that, at most any time I look, there are as many as 2000 737s (maybe 2000 if you count all 737 models) and close to 2000 Airbus A320s airborne.
For any type on the listing, click the type and get a map of where there are. From there, you can click a particular flight to get specific flight data (speed, altitude, route, etc.) More ADS-B, more data, less privacy.