I received a query about hotel recommendations in Paris which was “unsigned” (hence, will remain unpublished), and I just wanted to say I have stayed in hotels which are part of the corporate perks of Alan’s job. Although these hotels are well-appointed being located in the Opera and Champs Elysees areas, they are pretty pricey and I’m not too sure we would’ve stayed there if they weren’t free because they are very expensive.
Although I cannot make recommendations, I believe a good guideline would be that the hotel be centrally-located so you can access the sites you want to visit. Good luck!