Well, define success I suppose. I think of people like Robin Williams, Carrie Fisher, Stephen Fry. But many others I suspect have it come to mind also. (Wont call them out). And other people who suffer mental illness like Brittney Spears, Maryln Manroe (suspected BPD which is pretty common knowledge I think). Many might not consider them successful, but it depends on how you define success and the extent of your illness. They have been very open about their failures, or have been quite unwell in the public eye and still managed to regain their dignity. With Robin, it's tragic, and I know some will be furious with me for saying so, but he died on his own terms. I respect him for it but cannot explain why without writing an essay. Success can be measured in various ways.