I use Michelins on our Itasca. I don't let the tire shop pick the brand or size. I researched the various Michelin lines and then went into the tire shop and told them to order and install the Michelin tires that I specify.
I'm currently running Michelin 215/85R16 Defender Load Range E tires on our Class C and they show no wear after a couple of years and make no noise on the highway. Their tread is M&S (Mud & Snow) rated - for good traction in dry or wet weather. They carry a 6 Year, 50,000 mile warranty.
The stock tires were another Michelin tire type in 225/75R16 size Load Range E, but I switched to the Michelin Defender 215/85R16 size Load Range E tire to get a slighly taller tire for more ground clearance but with the same load rating, and to get a more advanced material in the tire sidewalls.
But .... they are far from the least expensive tire you can get by with on a Class C motorhome, so you have to budget for them.