Best option for FAST credits that will transfer into UPENN LPS or Harvard Extention

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I'd like to earn about 60 undergraduate credits as soon as possible from an accredited university WITHOUT testing out.

I attended 2 different colleges and did poorly back in 2008 because of personal life situations. I received my GED in 2006.

I applied to University of Wisconsin Flex but was denied, they stated I should get some community college credits and reapply in the future.

I've looked into NAU, TESC, and WGU. WGU from my research will deny me.

Would UPENN LPS and Harvard Extension accept credits from NAU and TESC? I'd prefer not to attend community college because it'll slow up the process. I'd be starting with about 6 credits but would have to apply as a transfer student and would be denied because of my low gpa and hopefully be granted admission on the appeal and will miss my opportunity to start on time with my two options.

Price not important what are some recommendations? I'd like to apply for UPENN LPS for the summer term. Harvard Extension is my backup to start in the fall but either way I'd like to improve my transfer credit eligibility. Undergraduate bachelors program I'll be applying to.