If you want to bake a cheesecake that is fluffy instead of dense, try making an Italian cheesecake. Italian cheesecakes are made with a mixture of ricotta and mascarpone cheeses, which makes it fluffy instead of dense.
I made a Spumoni Italian Cheesecake
in the Amoretti Test Kitchen. You can just leave out the extraneous items like syrups, fruits and nuts and make a one dimensional Italian cheesecake if you wish.