7 Nights for Museums in the Cotes d'Azure

Any reason you are not considering museums in Nice itself? I had to abort my last trip just before Nice, but these were on my itinerary: Museum of Modern & Contemporary Art (MAMAC), Matisse Museum, Palais Lescaris for musical instruments, important Beaux Arts Museum, check Massena Musee for special exhibitions, Chagall Museum.

Nice has so many good museums to see, and it may be beneficial to buy a pass. We enjoyed 2 which I did not see in your list.
The Musée des Beaux-Arts Jules-Chéret in Nice is amazing. I especially enjoyed the small room dedicated to Dufy.
The Musée Masséna is delightful for history buffs. “Built between 1898 and 1901, this sumptuous belle-époque villa now houses a fascinating museum dedicated to the history of Nice and the French Riviera.”
Chagall is buried in St Paul Vence, but his museum in Nice is a must, and lunch at the cafe in the garden is an additional treat.
I adored the Ephrussi-Rothschild Villa in St Jean Cap Ferrat. The residence from La Belle Époque is in an amazing setting, overlooking the Mediterranean. The gardens are fabulous, and you can sit on the balcony to watch the fountains move in unison to the accompanying music. There is a lovely cafe on the grounds as well, so a half-day can be easily enjoyed here. We traveled here by taking a train from Nice, then the bus which stopped right outside the property.
So much to see and do. I hope you have a great trip.

Yes...NICE is on the list!

Beaux Arts
MAMAC - thought I read this was closed.
Matisse
Chagall
Check exhibitions at the Lescaris
3 churches: Russian Orth., St Jacques, Reparate

Any Nice hotel recommendations?

Thanks.