Plants use solar, but very few natural things use wind or tidal power. Nature has had a very long time to try and fill these energy niches, so it is a safe guess that they can't produce enough energy to sustain a large population at a reasonable standard of living.
The productive renewable path is solar - and this article suggests we have quite a way to go for mass production there - or relying on difficult to access energy sources like coal or uranium, maybe geothermal - which the biosphere has difficulty getting to.
If tidal power was really an option, I would expect to see more coastal trees taking advantage of it. If wind was an option, there would be plants using it to survive. Both these things probably exist, but neither in the numbers to suggests they represent a better deal than solar power.