So, how long is the "complete list" of green companies that AREN'T failing?
Don't know, I can't seem to find a specific list of successful green energy companies. And that in itself might be the answer to your question.
The fact remains that oil, coal, and natural gas are still the most efficient, cheapest, and abundant sources of energy we have and it will be so for the foreseeable future. It's estimated that there is a 300 year supply of oil under Alaska if only the environmentalists would let us get at it. And if we don't build the Keystone pipeline all that Canadian oil will go to China and not stay in the ground.
Wind and solar are fine ideas but the cost vs. return are still too high for them to be viable for wide scale usage. We'll get there eventually but probably not in our lifetime.