It's probably AntPool (it has overtaken DiscusFish).
There is a new private pool deploying for the last month, 'bw pool'
https://blockchain.info/charts/received-per-day?showDataPoints=false×pan=30days&show_header=true&daysAverageString=1&scale=0&address=1JLRXD8rjRgQtTS9MvfQALfHgGWau9L9ky
https://www.bw.com/
EDIT:
The stats page claims that the pool is running 34Ph/s (~390 BTC Daily) but it looks like they are hitting almost double that according to the pool address.
They must be running a private pool for around 26Ph/s or have their own mining power.
James what is see BW hasharate fluctuate a lot, but total hashrate does not change in same way, so I am convinced they are in partnership with someone else, I know they have miners from our Chinese friends but dont know if 100%
Juan