‘City Lights’ from 1978 is a great album, but a bit of a decline until ‘Going back to New Orleans’ in 91: a top album but padded out in places. His ‘Duke Elegant’ (tribute to Ellington, obvs) is a good collection with a tight band. ‘Creole Moon’ a more recent decent album.
There are great tunes on most of his releases but if you buy the early and late period best of collections you have most bases covered.