You've added the caveat (and it's appreciated) but saying someone/something is the best at anything is a tall, tall order. Never align yourself to a tech, service or company so much that you miss anything else on the horizon.
Stripe rocks.
Documentation, interface, team, vision, customer service etc, it's all a notch above the expected. If there ever was a company that I wished that I could have invested in early stage this was it. Dropbox, Airbnb & Heroku are all great companies, Stripe has the potential to be an awesome company (no offence to Dropbox, Airbnb & Heroku intended).
That I like the founders on top of all that makes it an even better story, what's not to like about Patrick & John?
Stripe is a story worth knowing about, even if you're not in the payment industry, this is how you do a start-up tackling a tough problem.
However, there are others doing similar work that deserve similar accolades. Balanced is one example. I think the work that Square and now Shopify are doing in the POS space is laudable.
It's just a matter of seeing the forest through the trees. Stripe is a big tree, obscuring a lot at the moment (with good reason) but it behooves us to continually look around and find new opportunities lest the entrenchment of companies like Paypal take root again.
Recognizing one's merits while disregarding another's merit (whether by malice or ignorance) has similar effects to just undeservingly trashing a company.