Morris has 2 children - https://www.jw.org/en/library/magazines/w20150515/remembering-first-love-for-jehovah/ - but they were not disfellowshipped as ChatGPT claims. At the time of Morris' removal, they both had high ranking 'jobs' (one was the US branch overseer or something like that) at WTBTS, so there was some speculation back then, right now both of them seem to still officially live at a WTBTS address.
Not sure what happened to them since, I would assume the WTBTS doesn't want to 'shake' that tree too much.
David H. Splane doesn't have any kids. It's pretty easy to find out - Born in 1944, started pioneering in September 1963 (20yo). A
graduate of the 42nd class of Gilead (1966, 22yo), he served as a missionary in
Senegal, Africa (1966-?), then for 19 years in the circuit work in Canada (?-1990). Then he has been at Bethel. So none of those positions would've allowed for 'children'.
The rest you can find similar reference, they self-publicize enough self-aggrandizing life stories. Even the lesser known ones, eg Jacob Rumph, The 132nd class of Gilead means 2012 he was between 21-40 years old, at least 2 years married, and had no children at that point, by 2023 he was a GB member, that's only 10 years, so he can't have raised children even if he 'dropped out' after graduating at that point.
Now, whether some of them have some 'illegitimate' children could be an issue of contention, but I'm fairly sure they 'screen' for some of those 'undesired' attributes.