Others have built human-scale multirotor electric aircraft. eHang has been demoing theirs for years.[1] eHang has 16 motors and 16 props. They've been through a few iterations on the design, so they're past the prototype stage. But they seem to be kind of stuck. These drone-based things are so limited in range due to battery capacity and weight constraints that they are not yet useful.
Aviation Week and AAM have a "reality index" for companies in this space. Currently, Joby Aviation and Volocopter lead, followed by a three-way tie between Archer Aviation, Beta Technologies and EHang.[2]
Joby [3] is a 6-prop tilt rotor with a minimal wing. It can take off and land vertically, but flies more like an ordinary aircraft. This takes less energy than helicopter mode. Joby's range record is 151 miles in a 77 minute flight, going round and round over an airport. This is a complicated aircraft and takes a skilled pilot plus considerable computer power.
Volocopter [4] has 2 seats, 18 props, and really good renders on their web site. They're demoing at the Paris Air Show, starting tomorrow. They're working, slowly, towards type certification in Europe, then certification as an air carrier. Range limit maybe 60 miles.
There's still the clown car of the industry - Moller. Real Soon Now for over 50 years.[5] Apparently "inactive", but the web site is still up. They once did get a prototype, running on a large number of small Wankel engines, to hover while connected to a crane for backup.
[2] https://aviationweek.com/aerospace/advanced-air-mobility/lea...