Characters like that are available through system prompts on any LLM. Unfortunately I find the tone of the prose doesn't change much from one author to another, it's still very chatgptlike, but sprinkles in references to the topics the author might go on about.

Also there's not really evidence epstein was a banker, no one knows who was financing his operation or why millionaires would add to his portfolio without any expectation of returns, since, the money was never actually invested in anything