First of all, you display ignorance by describing Colin Powell as a token. He served in the Army with distinction for over 30 years and rose to the rank of General long before he entered politics. He fought in Vietnam and served in Korea. You should read his book (My American Journey). He was sought after by both major parties as a Presidential Candidate but turned it down. Had he run, he would be President of the United States, and leader of the free world (your leader).
I'll name a few other black leaders, but I'd rather you do some research and become more informed before making assumptions. I'll name key leaders in not just politics, but business, the military and otherwise.
Clarence Thomas (Supreme Court Justice)
Walter Williams (Economist)
Thomas Sowell (Sociologist/Writer)
At least 10 Generals in the Army today.
Oprah Winfrey (Hugely successful entertainer/producer)
Magic Johnson (Former Pro Athelete, Succesful CEO and Movie Producer)
James Johnson (Publishing Company Giant)
JC Watts (Leading Congressman and future Senatorial Candidate)
Alan Page (Leading Judge in the state of Minnesota)