Secret knowledge of am impending disaster - This doesn't fit the JW's. They have been printing loads of literature about this and the Armaggedon has been part of the teaching of the JW's since very early. It's not a "secret knowledge".
This knowledge is revealed only to the leaders of the JW religion, i.e. the Faithful and Discreet Slave Class, these days just the GB. The ones who dispense spiritual food at the right time. Without their private pipeline from Jehovah, this knowledge would not be available. And they don't mind letting all their followers know just how fucked they'd be if they don't follow their lead. So ... yes it does fit the JWs.
Insulation from the outside world (either mentally and/or physically). Partially true (mentally), not true (phisically).
If you wanna nitpick it from a literal sense, then no, JWs are not physically insulated from the outside world...that is, they aren't hogtied in a compound basement, never allowed to step outside and be seen.
But - since JWs are forever warned and counseled about the evils of the world, and associating with worldly people, they are in a sense being insulated, not only mentally but physically. By instilling fear of worldly events, people, activites, JWs tend to isolate themselves from the world around them to a large degree. So ... yes there is a form of physical insulation from the world.
A charismatic leader that appeals to the desires of the followers - Completely untrue with the JW's.
This one is a bit tricky when it comes to JWs. Since Russell and Rutherford, they haven't had a charismatic leader, and they have over time focused on a leadership group, instead of one man. While there is no Jim Jones, or David Koresh, that is charismatic, the leadership does appeal to desires of the followers, in telling them they can live forever, be saved from destruction, etc. They appeal to a delusional longing of being special and different than the world around them. While not charismatic, they appeal to the followers by making all of them feel special by being in association with the "brotherhood" as led, conveniently enough, the very men who just told you they were being used by God.
A sense of tension due to the impending doom (that never seems to happen). The hype around 1914, 1925 and 1975 momentarily corresponds to this, but without a given date-target, the JW's are much more relaxed about "the end".
They aren't relaxed. They're just more confused. The WTS has stumbled and haven't found a way to keep the sheeple focused on 'the end', but there is a sense of tension. How many dubs go 'round saying, "this world is so bad. I'll be glad when the new system gets here and solves all our problems". Procrastinating and avoiding problems to the point of expecting some invisible entity to take care of them for you is bound to create tension.