Which are the best 1-year on-campus programs in the US at the moment? I've seen Kellog and Northwestern come up a lot. Any other close contestants?

Try this https://find-mba.com/lists/top-10-one-year-mba-programs-in-the-us 

As mentioned on that page, Colombia also has a 16-month option: https://academics.gsb.columbia.edu/mba/admissions/options-deadlines/j-term 

Thanks so much Stuart! Looking deeply into the Columbia one now; it looks very appealing.

Certainly, here is a list of universities in the United States that have offered or were known for offering one-year MBA programs. Please note that program offerings and details can change, so it's important to verify the current status of these programs before applying:

Northwestern University - Kellogg School of Management
Cornell University - Johnson Graduate School of Management
Massachusetts Institute of Technology (MIT) - Sloan School of Management
University of California, Berkeley - Haas School of Business
University of Virginia - Darden School of Business
Columbia Business School - Columbia University
Babson College - F.W. Olin Graduate School of Business
Emory University - Goizueta Business School
University of Florida - Warrington College of Business
University of Pittsburgh - Joseph M. Katz Graduate School of Business
University of Miami - Miami Herbert Business School
Rice University - Jones Graduate School of Business
University of San Francisco - School of Management
Thunderbird School of Global Management (now part of Arizona State University)
University of Rochester - Simon Business School
Babson College - Franklin W. Olin Graduate School of Business

Remember to conduct thorough research on each program to ensure it aligns with your goals and preferences. Program details, admissions criteria, and rankings can change, so always check the official websites of the universities for the most accurate and up-to-date information.
Or consider: https://find-mba.com/lists/top-10-one-year-mba-programs-in-the-us

Certainly, here is a list of universities in the United States that have offered or were known for offering one-year MBA programs. Please note that program offerings and details can change, so it's important to verify the current status of these programs before applying:

Northwestern University - Kellogg School of Management
Cornell University - Johnson Graduate School of Management
Massachusetts Institute of Technology (MIT) - Sloan School of Management
University of California, Berkeley - Haas School of Business
University of Virginia - Darden School of Business
Columbia Business School - Columbia University
Babson College - F.W. Olin Graduate School of Business
Emory University - Goizueta Business School
University of Florida - Warrington College of Business
University of Pittsburgh - Joseph M. Katz Graduate School of Business
University of Miami - Miami Herbert Business School
Rice University - Jones Graduate School of Business
University of San Francisco - School of Management
Thunderbird School of Global Management (now part of Arizona State University)
University of Rochester - Simon Business School
Babson College - Franklin W. Olin Graduate School of Business

Remember to conduct thorough research on each program to ensure it aligns with your goals and preferences. Program details, admissions criteria, and rankings can change, so always check the official websites of the universities for the most accurate and up-to-date information.
Or consider: https://find-mba.com/lists/top-10-one-year-mba-programs-in-the-us

If you want more, go to https://find-mba.com/search/result?area=15&duration=6;13&accredition=true use "Expand search filters" to select duration and other options, like GMAT and tuition. 

[Edited by Duncan on Aug 28, 2023]

Thanks! Hadn't realised you could filter by duration.