E. Lee was your Sulla. He lost, btw. Best case, Caesar = Lincoln (including theatre Brutus) and FDR was Augustus. Don't look so pretty up close, do they?
Alternatively: nobody is interested in Byzantium because east/west flipped. England is Western Rome. America is Eastern Rome. To research Byzantine history all you have to do is open a newspaper or go outside. The politics are certainly opaque (dishonourable) enough.