Federal investigations always take forever.
Highest Profile Individuals Convicted Kareem Serageldin (Credit Suisse): Widely recognized as the only high-level Wall Street executive to serve prison time directly related to the GFC.
Many of the TARP convictions (the ones that involved the SEC) can still be found here, though:
https://www.sec.gov/enforcement-litigation/litigation-releas...
Fun read.
Did over 200 people in the US go to jail for the GFC? I just tried looking and I only see 1 person in the US. Iceland had about 25.