a large percentage of founding fathers were slave owners and
there was a large percentage of them who were abolishionists. It's not like it's a dichotomy (as a majority vs. a minority would be)
Even assuming that the evidence posted by Hatuey (which, unlike your claims, has not
been proven to be innaccurate) which claim 25 of 55 delagates owned slaves, and we use the numbers what you posted (with the addition of those I added to the list, of course) we get two possible numbers. 15 out of 55 if we exclude those who probably didn't own slaves in 1787, such as Franklin, Wythe, Morris, and Dickenson (Madison was a slave owner pretty much his entire life), or 19 out of 55 if we are more honest and include those people in the rankings.
This means that, at minimum
somewhere between 27% and 35% of the founding fathers who were delegates at the Constitutional convention owned slaves in their lives. One out of every three or four at a minimum
Now, this is
a large percentage. For example, if 27-35% of your brain were to stop functioning, it would be considered extensive brain damage. If you lost 27% of your limbs, it would be a large percentage.
Is it a majority? Of course not, but nobody claimed it was.
But remember, this doesn't include signatories to the DoI or Articles of Confederation.
The founders weren't interested in anything universally except establishing a nation. Hell, a good number of them opposed teh damned constitution itself.
But many were in favor of abolition and many were not. There were differences in opinion on the matter.