That would be Mel or Melvin or M.E. Bradford. But would all those Episcopalians (Anglicans might have been a better term) really have been Calvinists? Anglicans and Calvinists had fought each other in the English Civil War and there was no love lost between Anglican and Congregationalist or Presbyterian clergy in subsequent years.
Jefferson may have considered himself orthodox in his later years, but would most orthodox Protestant Christians have considered Jefferson one of their own? If you were a part of Jefferson's class and kin, formal Anglicanism (Episcopalianism) was the standard (Presbyterianism also might be acceptable), but the Unitarians claim Jefferson as one of their own.
Great link...I think the Jefferson Bible is a must read for anyone interested in Jefferson and Unitarian thought in early America.