Thank you D Bruno, Gina Jarvi and Marion Ceruti for your help.
I now have 83 slaveholder candidates using the techniques D and Marion suggested. They are in a spreadsheet as Gina suggested with the following column headings: A) Slaveholder (YNM); B) Slaves; C) Ancestor App Text; D) Doc citations; E) Landowner?; F) Property deeds?; G) Tax records?; H) Will & probate?; I) Census & occupation?; J) Family Search docs?; K) Slaveholder profile updated; L) Enslaved profiles created; M) Category (holder, enslaved, location); N) Name; O) Wikitree id; P) Birth date; Q) Birth town, city, county; R) Birth state, country; S) Death date; T) Death town, city, county; U) Death state, country; V) Residence State, country.
Hopefully, most of the cells A-M & V will just be reminder placeholders. In cases where there is information found, it'll go into the cell. Cells N-U have been filled in already. State & country columns are isolated to simplify sorting. And they indicate (S)lave or (N)on-slave states.
Have I overlooked anything?
Should I document profiles with sources that show non-slave holding? For example, my 2GGF named his son for an abolitionist ancestor who inherited slaves and set them free except for the boy he freed, adopted, and treated as a son.