There's a paper on Academia titled 'Aristotle and the Uses of Contemplation' (M.D. Walker, CUP 2018), by Tom Angier. It's a review of Walker's book of that title. It mentioned something new to me (me being basically ignorant about Aristotle), which is that Aristotle's highest good of contemplation was theological.
Although not mentioned, this got me thinking that Epicurus' insistence that the gods are real likely was some kind of response to Aristotle. Since Aristotle placed (theological?) contemplation quite highly, Epicurus was making a point about the importance of contemplating the true nature of the gods and of the importance of pleasure.