Moving from UoL to one of the Big Three

[Leedeedee]

Since UK credits are a bit different than US credits (a full UK bachelor's degree consists of only 12 individual classes, usually pursued four classes per year for three years), my concern is schools in the Big Three might view the four courses I've taken as a total of 12 credit hours (1/10th of a BA from TESU) rather than the higher value that UoL places on those classes. 

I'm hoping that someone here might be able to offer any guidance if there's a way I can move forward as quickly as possible through one of the Big Three. If not, perhaps my best path forward is to continue with UoL.

Thank you.

You need to get your courses evaluated through an international credential evaluation company like WES https://www.wes.org/.  My completed UK 3 year degree was evaluated at 120 credits.  I strongly suspect your 1st year certificate will be evaluated at 40 credits. 
However you won't know for sure until you've sent it.  In fact I think that most US universities won't take the transcript directly from a UK university, they need it translated first by the agency they specify.  TESU accepted my WES transcript, I don't know about the other two.