I can post some more articles.
https://www.hollywoodreporter.com/news/ren-auberjonois-dead-star-trek-benson-actor-dies-at-79-1260677
https://www.seattletimes.com/entertainment/benson-star-trek-actor-rene-auberjonois-has-died-at-79/
Here is a Touched By An Angel site that has a forum along with other stuff such as video clips and photos.
http://tbaamemories.com/
I myself just happened to join the site.
Ron's cause of death was complications due to pneumonia:
https://www.hollywoodreporter.com/news/ron-leibman-dead-actor-angels-america-wheres-poppa-friends-was-82-1197320