Laghetto Stilo Barra Rio is a good hotel close to Praia da Barra da Tijuca - it has scored 8.5 over 2,123 reviews from HotelsCombined users.
Ibis Copacabana Posto 5 is a hotel near Copacabana Beach that is popular with HotelsCombined users, scoring 8.1 from 1,876 reviews.
Close to Praia de Ipanema you will find Fairmont Rio de Janeiro Copacabana, which has a rating of 9.0 over 1,100 HotelsCombined reviews.