To me this is not a matter of one is right but a matter of their work for Divinity. Some work under a religious umbrella for those who practice that religion. Some work under a universal umbrella for those in general who are not dedicated to a religious tradition.
For the later, Hazrat Inayat Khan who brought sufism to the West, had a prayer (salat) which included this:
Allow us to recognize Thee
In all Thy holy names and forms;
As Rama, as Krishna, as Shiva, as Buddha;
Let us know Thee as Abraham, as Solomon, as Zarathustra, as Moses, as Jesus, as Mohammed,
And in many other names and forms,
Known and unknown to the world.