As in most discussions era to era comparisons are fun but not really applicable for all sorts of factors, including the opportunities for competition and the strength of opponents.
That being said, Thorsten won the World 14, 1 in 2006, 2011, 2013, 2015, and 2018. He finished 2nd in 2017, 3-4 in 2010, and 5-8 in 2012 and 2016. He won the American championship in 2013, and finished second in 2012, 2015, and 2016. (I do not have records for the U.S. event held in 2016 ad 2017.)
Below is Allen Hopkins record, thanks to Charles Ursitti. (It does not include the 1990s, in which there were few straight pool events.)
August 25 - 29, 1970
5th Annual BCA U. S. Open
Grand Ballroom – Sheraton-Chicago Hotel - Chicago, IL
5th High Run 74
August 16 – 21, 1971
6th Annual BCA U. S. Open Sheraton-Chicago Hotel - Chicago, IL
25th
August 15 – 19, 1972
7th Annual BCA U. S. Open
Grand Ballroom – Sheraton-Chicago Hotel - Chicago, IL
9th High Run 141
January 26 – February 17, 1973
5th Annual Los Angeles World Pocket Billiard Championship Tournament American Legion Post 43 – 2035 North Highland Ave – Hollywood, CA
10th
August 7 - 11, 1973
8th BCA Annual U. S. Open
Grand Ballroom - Sheraton-Chicago Hotel - Chicago, IL
15th
February 1 - 23, 1974
6th Annual World’s Pocket Billiard Championship
American Legion Post #3 - 2035 North Highland Ave - Hollywood, CA
2nd High Run 150
August 5 - 10, 1974
9th Annual U. S. Open
Grand Ballroom – Sheraton-Chicago Hotel – Chicago
9th
August 16 – 25, 1975
10th Annual BCA U. S. Open
Grand Ballroom – Sheraton-Chicago Hotel – Chicago
5th
August 9 – 15, 1976
1st Annual PPPA World Open Asbury Park, NJ
11th
August 8 - 14, 1977
2nd Annual PPPA World Open Convention Center - Asbury Park, NJ
1st
August 12 – 19, 1978
3rd Annual PPPA World Open
Grand Ballroom - Biltmore Hotel – New York City, NY
2nd
August 12 – 18, 1979
4th Annual PPPA World Open
Holiday Inn Coliseum – 57th Street – New York City, NY
12th
August 16 – 25, 1980
5th Annual PPPA World Open 14.1 Tournament Roosevelt Hotel – 45th Street – New York City, NY
46th
August 16 – 25, 1981
6th Annual PPPA World Open 14.1 Tournament
Grand Ballroom - Roosevelt Hotel – 45th Street – New York, NY
15th
August 14 – 21, 1982
7th Annual PPPA World Open Pocket Billiard Championship
Grand Ballroom – Roosevelt Hotel – 45th Street & Madison Ave – New York City, NY
8th
August 13 - 20, 1983
8th Annual PPPA World Open 14.1 Tournament
Grand Ballroom – Roosevelt Hotel 45th Street & Madison Ave – New York City, NY
7-8th
November 18 – 23, 1985
World 14.1 Championship
International Convention Center - Niagara Falls, NY
5-6th
August 9 – 16, 1986
9th Annual PPPA World Open 14.1 Championship Philadelphia Center Hotel – Philadelphia, PA
2nd
November 28 – December 1, 1989
14th BCA U.S. Open 14.1 Championship
Congress Hotel – 520 S. Michigan Ave – Chicago, IL
7-8