Get your sax together : Jamie Anderson
For me, one of the best saxophone YouTube channels ever. This British guy is a real pro with a crazy sax pedigree, and a very good teacher. I highly recommend his free one hour masterclass and of course have a look at his YouTube channel. A lot of tips and sax info for all levels. And this guy is very funny (I really like this kind of British humor).
Yanick Coderre
A great French+English-speaking saxophone pro player and teacher. I personally bought his course to help me discover how to assemble my tenor saxophone and play my first notes. His YouTube channel is also full of great tips for saxophone sound and more.
Benjamin Dubray - saxophonistePro.com
Another very good pro player and teacher. A French saxophone expert. I'm not a huge fan of his website but his YouTube channel rocks.
mon coach de sax
Another French sax teacher. Several of his videos were very useful for me. Do not hesitate to have a look at his YouTube channel.
Café saxophone - cafesaxophone.com
Not really a teacher but a very good forum to be registered in if you like and play saxophone. Lots of threads, tutorials, tips, accessories and globally informations about saxophone. A great english speaking community so the only two mandatories points are : speaking english and having a saxaophone :)
And it is good to note that ads and optional paid account on this forum is not to let the forum owner getting rich but only to pay for the hosting. All profit supporting special needs music education and Help Musicians which is awesome in my opinion.