I use a bunch of Anker powered USB3 hubs. Not as cheap as the amazon basics, not as expensive as some of the other options.
Some are the 'vertically' stacked ports (ie. long edge above long edge) and some 'horizontally'. In both layouts there are problems with some types of 'dongles' (all work fine if short extension leads are used to connect alternate dongles such as you have with an Airspy R2 or SDRplay). I found the same to be true of most other types.
Photos might make my waffle clearer!
Horizontal layout: nooelec dongles will fit next to each other in each slot but wider types such as the rtl-sdr.com ones won't
The weight of the dongles is pulling them down and I'd recommend supporting them in this layout.
Vertical type: neither nooelec or rtl-sdr.com can be used directly in each slot and alternate ones need to be fitted using a short extension
Though the rtl-sdr ones might look almost ok above they are actually forcing each other apart and thus stressing the socket.
A 'standard' usb plug will fit into the socket between the nooelec ones.