The Indohellenic states. They actually campaigned as far as Pataliputra, but they probably didn't hold that territory for very long. Mathura, in the upper part of the Gangetic Plain, was one of their main bastions, especially when it was ruled by the noted king Menandros I (who has gone down in Eastern history as the deuteragonist of the Milindapanha, or the "Questions of Menandros", a Buddhist philosophical text that strongly implies that the king himself was, in fact, a Buddhist).Kind of curious about the purple in northern India, near Dehli, what Greek states controlled that? The Greco-Bactrian ones?
Because of Fener? I guess. That's a bit of a stretch, though. I mostly went with stuff that was uncontestable.You could also make an argument for Wallachia and Moldavia.