Yes, the Parabrahman in Vedas is none other than Lord Vishnu who is also known by various names as Narayana, Hari, Vasudeva etc.,. Let's analyze the Vedas (Samhitas, Brahmanas, Aranyakas, and Upanishads) and see where it is said so.
Let's go step by step,
Let's first see who is the god who created these organs and the god behind the sense.
Who is the God who created these sense organs, the mind, and the senses and directs them in the direction of good or bad?
For this let us go into Talavakaropanisad It is also called Kenopanisad. This Upanishad is the discussion between Chaturmukha Brahma and Sadashiva. SadaSiva asked three questions in respect of the director of our mind senses, and Mukhyaprana.
1) Who directs the mind's movement towards good or evil objects? 2) Directed by whom the Mukhyaprana the supreme among the jivas directs the other jivas. 3) Who directs the senses i.e., eye, ear, etc., towards the respective objects?
The mind being merely an instrument, it cannot move towards the objects on its own. Somebody has to move it. The Jiva himself cannot move it, because, it does not always move in the best interest of the Jlva. Therefore, it must be moving by the direction of someone else. Now, this someone else is Mukhyaprana. It is Mukhyaprana who directs the manas. This leads to the second question as to who directs Mukhyaprana. This position is made clear by the answer to the third question. The third question is an elaboration of the first question. But it elicits the answer for all three questions. The third question asks who directs our senses viz., eye, ear, etc. then Chaturmukha Brahma answers this as:
तत्र तत्र स्थितो विष्णुः तत्तच्छक्तिः प्रबोधयन् । एक एव महाशक्तिः कुरुते सर्वमंजसा ॥
“Lord Vishnu resides everywhere (in all the senses) providing strength to them, He is the ultimate power”
The answer is he who has given the power of seeing to the eye, the power of hearing to the ear, the power of thinking to the mind, and finally who has given the power to Mukhyaprana to direct all these. Such a great personality is Lord Visnu himself. Thus<, this answers all the three questions. By this one has to know that the capacity to know God is very limited and none can know him completely.
According to the hierarchy of devatas, although the power to control the mind rests with Lakshmi, Mukyaprana, Rudra (Shiva), Chandra, etc., it is important to know that Lord Vishnu is the supreme controller of the mind and senses.