...the grey rain-curtain turned all to silver glass and was rolled back, and he beheld white shores and beyond them a far green country under a swift sunrise.
I would ask this in the 1 Player Guild forums.
They can likely give you tons of games.
Yes! Come join us at the 1 Player guild. We'll be happy to help you spend your money!
However, you can start here: SoloPlay Variants Posted on the Geek to find not usually solo-able games that have some extensive work done to make them solo-able.
The 1 Player Guild also has this list of many, many well regarded games that are solo-able to varying degrees: https://www.boardgamegeek.com/wiki/page/Solo_Gaming_Awards#