Hi Avangi
This goes off in a slightly different direction since it leaves the "Not only" aspect out of the discussion.
To me, "do not I" would sound rather biblical (or so sayeth the Lord).

On the other hand, the contraction "don't I" is in common use. However, when "don't I" is written out in uncontracted form, the standard is "do I not".
Avangi I couldn't find it, but came across lots of third person examples, like "Does not a doubling of oil prices need a fitting response?"
Would you feel comfortable using a
pronoun that way? In other words, would you be willing to change "a doubling of oil prices" to the word "it" and then say this:
"
Does not it need a fitting response?"
Would you say or write any of these?
Do not you
Does not he/she
Do not we
Do not theyThose would sound poetic to me. Possibly a highly stylized usage.