D.W.
Don't try to take everything away at once. this will cause frustration and confusion for everyone.
I would also discourage try to lose a night feeding if that is what he currently needs. Babies need to be fed on demand 24/7. One isn't this magical age where everything changes and they are grown up. Especially breastfeeding infants. Gradual shift works well for them. Wait until he is old enough to start trying whole milk, warm it and give it to him in a sippy at naptime rather than nursing him to sleep. This is how I began the transition with my exclusively breastfed munchkins.
And there is nothing wrong with nursing a baby to sleep, nursing a baby to soothe. Nothing.