Generator for Rving, any recommendation please?

Many RVers carry generators.
Honda and Yamaha are generally considered to be the best when it comes to quiet and quality. They're also probably the most expensive.

Champion Generators have good reviews and a decent support/parts system.

Depending on your needs, have you considered a larger battery bank and solar system? It doesn't get quieter than solar.

Before you buy any generator, check for parts availability.