The last named Vedanta Darsana was compiled by Sri Vyasa after a thorough refutation of all other five Darsanas and therefore Vedanta is accepted by all Indian scholars and no body is recognized as bona fide who has no interpretation of this Vedanta Darsana.
The Western philosophers mostly of the Sankhya school have less aquaintance with the Vedanta Darsana and philosophers like Kant, Mill, Aristotle or Schopenhauer etc all belong to either of the above five Darsanas except Vedanta because limited human thinking power cannot go beyond that stage. But Vedanta Darsana is far beyond the limited mental speculation of the human brain conditioned by material nature. Unfortunately Sankara who belonged to the Mayavada school made a misinterpretation of the Vedanta for his own purpose to convert the Buddhists in India.
The Ramakrishna mission although it does not come out of the above six schools of philosophers—generally they prefer to call themselves as Sankarites or belonging to the Mayavada school. Interpretations of Vedanta made by them are neither Mayavada nor Satvatta. They have their own interpretation different from the Vyasa school of philosophers.