What makes you think there's only one solo miner? Seems to me there are several . .
These addresses come from the same wallet (XpoolX):
RFqKLWLtxR5K6i4VsR8vDHsusvuF3Csg1E
R9KQKgP1YckHoGJuyjHNuwGijQ9Pev1ryc
RR1eWm6tPdD6fEXtkZYEivGihSL6WwU8CH
The first one have a 5% fee to the third address, which also Solo mine with 0% fee.
Blocks resolved by these 3 addresses range from 50% to 70% of entire network.
Also "All others" addresses periodically send coins to another 4-5 deposit addresses.
All these coins (about 75-80%

) are conveyed in 3 final addresses (2 Poloniex and 1 BTC38) by the same person!
You have the necessary considerations......
Can you probe these 3 addresses come from the xpoolx wallet? or maybe are your conspiracy speculations again?
Maybe if you didn't forked the chain months ago the people did no try to soloming, but the most important think is:
What the hell is your problem with solominers? im getting less than 10% of the network blocks and im not crying like you, kiddo. Seriously Simba, GTFO