Your own stats show he was pretty beatable aside from 1978.
I'm trying to understand the logic here. My claim is that drafting helps. So, you can't disprove that by referring to cases where people set world records while leading part of the way or even the whole way, like Rudisha's 1:40.91. There's something called wind that slows you down. Drafting allows you to save energy. Ergo, drafting helps. You cannot draft a world record the entire way. But Ngeny and Lagat drafted their way to 3:43 and 3:26.3, respectively, behind El G. And El G had his drafters (including Ngeny at one point) through 1k or farther in most of his fast times. Even in championships, he usually had his personal pacer take it out hard. Of course, there can be bad pacers, etc. A steeple is more complicated, because having someone right in front of you with the barriers can cause problems, so you'll see Jager typically move outside before the jumps if someone's right ahead of him. There's no way in the world he would be solo time trialing an 8:04. Only a Rono like talent can do that.
Rono's time isn't slow even by todays standards. In fact, there is no one running the event today who could duplicate Rono rain drenched 8:05
Rono was great in races against college kids. Against the big boys, not so much. Despite breaking the 3000m WR, Ovett handled him with ease at 2 miles.
rono had run 50 races by that point