Swami Dayanand is one of the most renowned saints of India. He is the founder of a sect called Arya Samaj. The followers of Arya Samaj or Maharishi Dayanand are called Arya Samajis. The Arya Samajis consider the Vedas (Rig Ved, Sam Ved, Yajur Ved and Atharav Ved) to be the utmost scriptures which are indeed the most sacred of the Hindu Scriptures and at the time these Scriptures were written, there was no religion. So in essence these scriptures are not really specific to any particular religion or sect but are pertinent to the whole mankind.
Swami Dayanand laid a great deal of stress on the teachings mentioned in the Vedas and asked his followers to adopt the vedic teachings as the way of life. Undoubtedly Swami Dayanand can be regarded as the only saint who kept the Vedas alive and his followers continued the legacy forward by following his footsteps.
Unfortunately a deeper look in to Satyarth Prakash reveals the dark side of Swami Dayanand which raises questions about his character and his characterless and stupid teachings.