I will answer to the best of my ability but I WILL NOT go back and forth and argue.
Fair enough. Here are four of the teachings I cannot find support for in the Scripture. If someone publicly denies the validity of any one of these foundational doctrines or publicly affirms a contrary belief to any one of these, they risk expulsion from among Jehovah's Witnesses. I have source material readily available to show you, in case you question whether any of these are actually JW dogma.
(1) the Faithful and Discreet Slave is a class of people,
(2) that the holy spirit directs organizations, in addition to individuals,
(3) that the Faithful and Discreet Slave is responsible for revealing "new light" (as opposed to "food at the proper time") to anyone, and finally
(4) that Jehovah deals with individual other sheep differently than the little flock.
Can you establish these doctrines Scripturally without uninspired human interpretation?
The only thing saving me from expulsion so far is that I have not publicly denied the validity or publicly affirmed a belief to the contrary. But, in light of the point in What Does the Bible Really Teach? I don't feel bad about asying that if there is no support for these teachings in the Bible, then they are false.