Sardinian warbler, surely? At this time of year female Subalpine should/would clearly show white eye-ring and moustache. Chin appears to be lighter than chest/belly, which supports Sardinian, rather than Subalpine group.
Well then, for what it's worth - I have limited experience of Sharpie and Cooper's but have observed plenty of Eurasian Sparrowhawks, the default accipiter here. Whenever assessing A. striatus vs A. cooperii I fall back on what is familiar - does it look big/bulky for an A. nisus or does it look...
In a spot where I've not recorded owls for many a year. Is it an owl pellet, is it possible to narrow the species (Little, Barn, Tawny) down by the type of pellet/prey remains? Are any of the remains identifiable?
Sorry, looking at this one my phone screen the bird, clearly a falcon, seemed quite slight for a peregrine. Taking a good look on a much bigger screen, I can't see what else it could be other than peregrine.