There is a wooded area across the river and Great Horns can be heard hooting, especially this time of year, but have not heard them this year. Hopefully, they are still around and just moved. Usually hear Screech in the fall calling. Have seen all on your list, not necessarily all in Ontario, but cannot recall if I saw the different morphs of the Screech owl.
Anyone see the OFO zoom meeting, it was the gentleman from Hilliardton Marsh, near Temskaming, banding owls? Since 2000, they have banded 9600+ owls. Mostly Saw Whet, few Long Eared and 2 Barred.