I loved Mourinho PL-Mark-I immensely, used to follow Chelsea throughout his first jaunt in PL. Over a period of time his tactics were countered by others and he became jaded and a prisoner of his own hype.
One thing that is undoubted about him is that he knows how to set up teams, and yes, he is a little defense-oriented manager, but isn't that the biggest concern for us right now? Oh and of course he knows how to set up shape and create structure. His teams are not super defensive like, with sufficient data collection, I can probably tell you that his teams winning majority of the games 1-0 is kinda myth (I think). IIRC, he was amongst the first proponents (if not the originator) of the triangle movement up the pitch that made Makelele such a force to reckon with at CDM. It's only when things don't go his way, that becomes the "petulant one". If that somehow can be looked over/skipped/psyched out, he can be a great fit for us.
Prior to this season, I would have thought that he would not fancy Everton, not sexy enough for him, but after he chose to go to Roma, I do think he would not mind putting people in their place in England with another unfancied team a-la-Porto (I wish....)
2 year contract (Till end of 2022-23), with a caveat of binning him if he becomes the nasty-one, or the petulant-one or the grumpy-one.