edX
You're targeting a Master's degree or research role
MITx Statistics & Data Science is the strongest academic credential available online. Its 5-course MicroMasters explicitly transfers to MIT's on-campus Master's — and its problem sets are non-trivial enough that admissions committees take it seriously.
MITx MicroMasters Program in Statistics and Data Science
5-course program (probability, fundamentals of statistics, ML with Python, data analysis case studies, capstone). Counts toward MIT MS in DEDP if admitted; partial credit accepted at multiple universities.