Hazen are not self fertile. Here is a link from Orange Pippen that identifies some pollinators. Your Whitney and Yellow Transparent should be a good match for pollination.
I have attached another link I recently received from Raintree Nursery which may be of help to you. Good Luck! Terry
https://naz.soundestlink.com/view/5fffeb44831b92252446c650/5ed0fabd4572ea2b1a05d154?signature=969a44ecd584e176786ed1fa6966cd207d6c1f352c17eebfb22dffbffd17da1e