I know several ENTPs. Some are 7s, but I have met 6s.
It'd be silly to rule out all enneagrams but two for an MBTI type.
1w2 or 1w9 (I'm just trying to mess with the poll)
2w3 or 2w1 (I'm really an ENFP)
4w5 or 4w3 (Screwing with the poll)
5w4 or 5w6 (Secretly I'm an introvert)
6w7 or 6w5 (Poll messin')
8w7 or 8w9 (I'm actually an ENTJ)
9w1 or 9w8 (Also a secret introvert and I'm cuddly!)
I'm not an ENTP, this poll is discriminatory to exclude me, PROTEST!