Nah, Ferry's a definitive crooner I reckon. You're right about the typical audience for crooners, but that's not what defines the style.
Ferry started different but I think as he got older he got more into trying to sing properly and being a proper crooner as opposed to his weirdness.
@Corpse; I'd argue its probably Kanye because Wayne's approach was more deliberately about hearing what happens when the effect of auto-tune corrected him, and T-Pain used it initially for guide until it became a textural effect. But I know Fetty probably isn't listening to Kanye, so I guess by default his big influence is Future.
Also to further fine-tune my point, its less "a shit singing voice" and more like, shit ability to sing. The instinct to know where the notes are in key, hit them right (not G sharp or g flat but G!), hit them clear (not too much vibrato or slur, no nasal tinge). Crooning was the idea that we wouldn't always like clear, clean and perfect singing and emphasize STYLE. So to put it in a certain indication of term, on a technical level Matt Monro would be a greater crooner as a Capital S Singer than Sinatra, but would we instinctually be able to make that distinction unless our ear is trained? What about charisma, little things that aren't 'good' but work for us, etc?