I have the answer, based on experience! The new remotes are far too confusing for a generation that grew up with knobs, dials, and rabbit ears. After careful research, and I've tested it, the best remote to get is called, "Flipper", sold by Flipper Remote. In Ontario, I could only get it on Amazon.ca. It's labelled as "Big Button Remote for Seniors", perfect, and simple too! Price: $60 CAD.
Please let me know how it works for you!