Looking at the different groups in your analysis, there were fire-eating secessionist radicals who owned a slaves but didn't end up in Davis's cabinet. They were judged too extreme. But they were a major force in pushing for secession. There were also some hangers-on of wealthy families who didn't own many slaves themselves but who pinned their hopes on the creation of a new slave-holding empire.
There were also those wealthy planters who weren't enthusiastic for secession. A lot of them went along with it, though. They saw how dangerous secession and war would be for their interests, but didn't want to rock the boat. If they stayed out of the Confederate government, good for them.
Compare, say, South Carolina with Iowa or Vermont and it would be hard to say that Northern politics were more elitist or oligarchic than Southern.
"All your arguments are nullities"?
Did I forget to check with you again?