Hi, I am using with Lakka and my Raspberry Pi 3 the Torid gamepad from Speedlink:
It works pretty well and the gamepad quality is good.
It includes a small 2.4GHz USB dongle.
I tested it in less than 4 meters range and everything went well.
It is recognized by Lakka as a Microsoft X-Box 360 pad.
I also used the analog stick as digitial function and it works well too. I haven’t changed anything else (buttons, etc.)
Just to let you know! best regards, Juan