Turns out it was Randy Mantooth of Emergency! fame. Coincidentally, Indian Country Today just ran an Q&A with him:
Randy Mantooth of 'Emergency!' Looks Back and Forges Ahead
By Vincent Schilling
In a conversation with ICTMN, Mantooth discusses his successful career, his love of speaking and how he's addressed the challenges unique to being a Native actor.
When I say they had no imagination in the 70s, 80s, and 90s, I am not kidding. My biggest fear is that if they viewed you as an "ethnic" actor you were dead. I resisted it at first, but I certainly didn't resist being who I was. I didn't want to be known as an "Indian actor" or sadly, I wouldn't get any work.
As I got older and I established myself as an actor, I became less and less afraid of that sentiment and I became more vocal about such things as Italians playing Natives in the industry, which has always annoyed me.
My dad, my grandmother, and my grandfather are Indian; my mother is German. My grandfather's Cherokee and my grandmother’s Seminole and Potawatomie. People ask me how I'm so many tribes. How do you do that? Well, you go to Oklahoma.
I have since become very vocal about non-Indians playing Indian roles which, as I said, has always bothered me. They say to me well, there are no Indian actors. I have responded with, "Go to Canada, because they have a lot of resources."