The Torklift EcoHitch and Kuat Sherpa 2.0 have worked well.
Kuat Sherpa 2.0 Review
In general, the EcoHitch has a load (not towing) capacity of only 200 lbs, so you need to use a lighter bike rack and use it for road bikes/lighter bikes vs big, heavy e-bikes, mountain bikes or cruisers. YMMV