The answer is none.
USB dongles dont have the size for a decent antenna, and you are restricted by the 5v power from the usb port for the transmit power of the antenna (and single antenna at that).
If you want to do online games and cant plug a cable directly from the router, the best option is to get a powerline network adapter that sends ethernet data over powerlines. TP-Link makes a decent 500mbps one for $40. I know you dont have 500mbps internet but that is not the real speed, trust me you want the 500mbps one over the 200mbps one.
In gaming you need response time, for networks that means low ping/latency. The powerline adapters will beat out wireless in ping/latnecy by a good margin.