I wanted to call any sound designer who has had professional experience in the industry because I am studying to become a recording engineer/sound designer within a year. I haven't had much luck finding sound designer's contacts.
As expressed above, getting some of these folks on the phone is going to prove difficult - and possibly even detrimental to your future career. (If somebody cold-called me in the middle of a tight schedule I'd be less inclined to take time out to chat, plus I'd want to know how they got my number.) That being said, I've had a number of people contact me through reliable channels that have led to productive conversations, visits and even job offers.
Regarding notable sound designers: I think you'll find SSD to be a wealth of knowledge, not only in how people approach sound design but also as a who's-who in the business. Many of the contributors are well-established sound designers for film, television, games, etc. And of course there are the more well-known who have published interviews and Q&As all over the place: Ben Burtt, Gary Rydstrom, Harry Cohen, Christopher Boyes, Glenn Freemantle, Richard King, etc. Look up any of those names on imdb.com if you're unsure of who they are.
I can almost guarantee that cold-calling ANY sound designer out there, for any reason other than offering work, will get you a negative response. Try email first (and, if you have trouble finding email contacts, you need to work on your Google-Fu), and, if they get back to you, ask if it's cool to call them.
But, to answer your question: Aaron Marks. He wrote The Complete Guide to Game Audio, and I know from my own personal experience that he returns emails.
And realize that by nature all sound designers are a bit off our rocker. What would drive someone normal to contrive sounds in unintended ways to fit with a video picture. :)
Plus, we're all a bit socially awkward so email is your best bet. Here is my email: Matthew@matthewfreed.com
Feel free to ask me any questions you may have. I've been doing this full time for 12 years. Sound design and production sound mixing is all I do for a living.
My first job in sound came by me cold calling a small studio in NYC and offering to take the owner (and sole employee) out to lunch to pick his brain about the tools of the trade. I offered to answer phones and do small tasks during that day in exchange for getting time on the equipment at night. Eventually he hired me at a VERY low rate, but it led to credits which led to more work. That was 1995 or so.
People like it if you show interest in their work, especially if a free lunch is included.
While I agree that in many cases cold calling can be detrimental, I got my first full time gig at a local mom and pop studio by cold calling and a bit of luck. It just so happened that the day before I called, another person had unexpectedly quit and they needed to replace them immediately. I was editing that afternoon.
Always leave a little room for serendipity.