REX AccuSeasons is the best thing out there at the moment, looks great and their automation is nice.
For Snow, your only out of sim option is REX WeatherForce. It does it much nicer than MSFS does it however it does come with it’s drawbacks.
Performance overtime / at transition is an issue (but can be worked around).
I loved it for GA, for Airliners, there were some issues with OAT at higher altitudes that messed with the engines, not sure where that stands at the moment.