Yes I did know ipster. I've met a few but can't think of anyone in my acquaintance who fits the bill now.
I can honestly say I've never known anyone who goes on about devils/demons and the like, when I was younger I was easily spooked and if I had encountered such a person I'd have run a mile. It's not likely to happen now. I used to read about that stuff though and scared myself silly, not surprising because I was actually frightened by Christopher Lee as Dracula when I watched old Hammer films on the telly! Low tolerance level.
Without wishing to generalise, charismatic/pentecostalists go in for praying in the spirit, healing and casting out of evil spirits. We have fringe churches in this country who do that, you mentioned the USA where it is more widespread but it's bound to be as it's a bigger country. I've not witnessed it personally but read about it and there has been the occasional news item or documentary.
I do believe we can be oppressed, whether it be by negative thoughts, guilt, past bad experiences, fears or even other people we know, and to lift that is very releasing. Secular counselling and psychotherapy can be helpful. The CofE and the Catholic Church both do a quiet form of praying with those oppressed who are also believers, but don't make a big thing out of it.
The Prince of Peace Community is something that charismatic Catholics interested in renewal may be involved in, they have healing services and run seminars but you wouldn't be interested. I believe Alan B has done a course with them, 'Life in the Spirit'. I also did that course in the early 1990s.