Ahead of McGregor, Alexander, Zaluska, and, Boruc? Admittedly, possibly one, two, or maybe even three on current form but not every one of those I have listed. For the record I think McGregor is a better goalkeeper.
Agree with Motherwell when he said "He is a great keeper, but I can't say he's the best we've had when he's only played 20-odd games." We had Buzz for four years and in that time there was a dip or two in form. You'll get that with any keeper. Ruddy will be prone to that too but luckily we haven't seen too much of it. It wasn't that long ago though where the guy was getting slated for being to blame for about 3 goals at Ibrox. You are only as good as your last game. Admittedly (and you can even stretch that to games) he has been fantastic recently. I just don't think he has been here long enough to call him the best ever or best in the last ten years.
Do I want him to stay though? Bloody right!! I'd like him to become the best keeper we have ever had. He certainly has that potential.