My Mom (who had Alzheimers) and I used to laugh a lot at a lot of things, and it helped us both. I don't know if we can recommend anything specific, but I found a book that makes my husband and I both laugh out loud about 50% of the time and at least chuckle at the rest. It is called "The Almost Wet Your Pants Book of Humor" by R. Bruce Baum. We read one bit of humor every night before going to bed to end the day on a laugh. I found it and many other books of humor at The World Laughter Tour, 5691 Asherton Woods Dr, Columbus, OH 43081. they are a 501c3. Laughter Arts & Sciences Foundation is also another site. There are also more social laughter clubs which can be accessed at https://www.laughterinstitute.ca/laughter-club/
I hope this helps.