That is true, Koillel. There are probably rabbonim with shtiblach and Chassidishe malbishim who are really chassidim of a major Chassidus but qualify as the Rebbes of some place long gone. There must be a shtibel with a Rebbe on every block of BP and even more in EY. The Stanislaver Rebbe is a mohel in London; I do not know that he has any Chassidim in the traditional sense although his shul is popular and he is a very well-respected mohel.
If you really want to give Chassidus a try, your best bet is Creedmoor :). Barring that, and if you don’t want Chabad or Breslov, I would look for a smaller, less established Chassidus that is open, like Mishkoltz or Pittsburgh in EY and I guess Boston or Reb Michel Twersky or perhaps Biala (Boro Park) in the US. The big ones, and the ones like Tosh where the Rebbe is aging, are just full of problems, ranging from corrupt gabboim and use of moisdos scams to succession fights.
If you want a brocho from a Rebbe, the best source now is probably not a Chassidishe rebbe but rather Rabbi David Abouhasira in Nahariya (grandson of Baba Sali ZYA). A brocho from the Tosh Rebbe is very worthwhile, but call ahead before you go up to Quebec especially in the winter; make sure the Rebbe is available. I do not know if the Amshinover Rebbe in EY gives brochos.
I am of course the Creedmoorer Rebbe’s gabbai and I receive all requests and send out all invoices for brochos.