The phrase "astonishing list" is correct and usable in written English.
You can use it to describe a list that is surprising or impressive in some way.
Example: "The conference featured an astonishing list of speakers, including several Nobel laureates."
Alternatives: "impressive list" or "remarkable list".
Over the years, Times scholars have overcome an astonishing list of obstacles (rough neighborhoods, poorly equipped schools, family drug use) to achieve an equally astonishing list of accomplishments.
(See the Wikipedia article "Rickrolling" for an astonishing list of high-profile rickrolls).
Al-Qaida leader Khalid Sheikh Mohammed has confessed to an astonishing list of crimes.
Since then, he's chalked up an astonishing list of classic character roles, including Tom Hagen, the Corleone family's lawyer in The Godfather.
An astonishing list of the perverse and freakish doings of the sea can be compiled from the records of the keepers of lights on lonely ledges at sea or on rocky headlands exposed to the full strength of the surf.
It was in the smoky lairs and clangorous nightclubs of downtown Manhattan that Mr. Ginsberg, in the 1960's and 1970's, tended to an astonishing list of acolytes, fellow avatars of the counterculture like Patti Smith and Yoko Ono.
An astonishing wine list, with very reasonable prices, covers all of Italy.
You say I have 'pared down our liberty at an astonishing rate', then list a whole lot of fundamental rights, as if these had all been drastically curtailed.
"The astonishing presumption of this list," Mr. Whitehouse, a Democrat, said.
Shall we list the astonishing matches they've been involved in?
The wine list is astonishing, with great bottles from France and California, plus all the Italian superstars: Pergola Torte, Sassicaia and all of Jermann's whites.
