By "essential reality" I mean consistent aspects of human nature and those of our temporary and ever-changing physical environment(domain of science) as well as overlapping views on spirituality(e.g. mysticism).
Something similar to the expansive history of human societies maps(commercial link to graphic). My interest is that unproductive conversations seem to get rehashed without an agreed-upon basis, and if we could point to a readily understandable visual model, we can decide where our starting positions are relative to one another and even if there enough common ground to engage. While this is less a problem in studious environments, it can only be the studied that builds and maintains such a model. Wouldn't this also help identify degrees of "misinformation"?
In summary, I'm asking does a multimedia 'Model of Everything'(1) that is knowable and communicable exists, and if not can we start building one right now? I'd suggest starting with the most basic and consistently agreed-upon aspects of reality.
(1) Like a visual Wikipedia where one can adjust presented detail(course to fine), then drill down into a selected area.
[2nd Edit] Selected models mined from the comments. I imagine the "Everything" model to be encompassing of interlocking/overlapping frameworks starting with the most generally useful and accepted truths. Life's Formula Unified Theory of Knowledge Also Mind Map: Philosophy Eastern philosophy mind map Introduction to Philosophy A Map of Reality.