I previously owned a 4-bike Küat NV. I absolutely loved the rack. However, I ended up selling for two reasons. One, it does not hold my Fat bike (4" wide tires) in a secure manner. Two, I had to use a hitch extension... and I was not a big fan of this.
I stumbled upon this rack from the folks at MTBR forum. Small Canadian company called North Shore Racks. It solved all the issues that I had with my previous rack. Notice how it straddles the spare? Bingo! Bikes all fit? Check.
They make a 2, 4 or 6 bike variant.
The racks are pricey, but I've noticed if you want good engineering and build quality, you have to spend the money.
If you suffered the same woes as me, this may be a good choice.
Visibility out the rear window...