Did any Indian Mahayana Buddhists have non-cognition as a goal?
Apparently that was Candrakīrti's position.

From Mario D'Amato's "Why Buddha Never Uttered A Word", quoting J.D. Dunne's study of Candrakīrti and Vose's study of Candrakīrti's commentator Jayānanda:


  ...As Dunne points out, for example, “Candrakīrti [c. 600–650 c.e.] holds strong views on the impossibility of a buddha having conceptual knowledge” (1996: 540). While, according to certain Buddhist thinkers, such as Dignāga (c. 480–540 c.e.) and Dharmakīrti (c. 600–660), perception is without conceptual construction, according to Candrakīrti’s view, “even raw sense data are in some sense conceptual,” so “at the highest state of understanding where one’s knowledge is completely nonconceptual, nothing appears at all” (ibid.: 544). Dunne goes on to specify that, according to Candrakīrti’s account of buddhahood, for buddhas “the fluctuations of mind and mental functions” have “completely ceased” (ibid.). Jayānanda (c. 1100), the only known Indian commentator on any of Candrakīrti’s works, affirms Candrakīrti’s account and “explains that enlightenment is a process of ‘not knowing’ and is characterized by the elimination of the knowing instrument, the mind” (Vose 2005: 191–192). (Footnote: Jayānanda writes, “Since enlightenment is by way of not knowing  (anadhigama) at all, we assert that the activities of mind and mental factors— feeling and so forth—[all] having the character of experiencing, have ceased their engagement”.) But how can a mindless buddha teach the dharma? Dunne states that, according to Candrakīrti, “the dharma-kāya causes a didactic sound to emit from a buddha . . . [but] the production of this sound does not at all mean that a buddha is cognitively active” (1996: 549).
  Being mindless, a buddha is unable to use language in any ordinary sense; on this view, a buddha only appears to use language—what is actually occurring is that certain sounds emanating from a buddha are interpreted by unenlightened beings as words and language. 


You can read the entire paper on academia.edu and it's included as a chapter in Mario D'Amato, Jay L. Garfield &amp; Tom J. F. Tillemans (eds.), Pointing at the Moon: Buddhism, Logic, Analytic Philosophy. Oxford University Press. pp. 41--55 (2009) - from where you can get the references to bibliography for Dunne and Vose works.

D'Amato has quite enough to say on "non conceptual cognition". If you are interested in that topic I suggest you check his this and other works. He provides interesting references too.