Here's my favorite chair of the many, many, of all sizes, I've used -- the GCI Unifold Recliner. It's the most comfortable bag chair I've ever sat in. Drum tight seat, no sagging, real chair seat height, three recline positions, and solid arm rests for relaxing, reading and getting up.
Chair choice depends on what kind of canoeing you are doing. Only a very small percentage of my paddling includes long carries. I can take this 9 lb. chair on everything else: day paddles, river trips, big lake circumnavigations, and portages using wheels. There are no portages, for example, on Georgian Bay, so why would I be worried about chair size or weight?
I take this chair on all my local day paddles to a favorite reading spot on a rock promontory, where I spend a few hours with a book before paddling back.