Years ago a restaurant in Vancouver, aptly named "Alfredo's" made the best Alfredo sauce I have ever had before or since. I got to talk to the chef once and asked what made the sauce so special - he said that not trying to make it special was the key.I made fettuccine alfredo for dinner last night. Butter, heavy cream, parm, salt pepper. So simple and so delicious.
The ingredients you mentioned, GB are exactly what he used. Of course he didn't give me amounts and it took me awhile to get it right! Oh, he didn't even use pepper but the waiter would come around with this huge pepper grinder and offer some for the top. A perfect addition!