by Wister
It is a brain-burner type of game, but very do-able solo. I also am a person who hates a lot of upkeep to solo board games, but don't hate doing it for Gloomhaven.
It will take time, be aware of that. You have to slow down what you want to do to think things through.
One game you may love is Dungeon Alliance. It feels like Mage Knight (says everyone who has played both games--I haven't) without the dozens of rules exceptions and multiple hours of play.
I love it solo. Absolutely love it. You control 4 heroes and have to make some decisions for the monsters, but it doesn't overwhelm you. Not even close. I love the multiple decision points via the card play. It's a deck building game and plays different from most.
A few expansions have just been released that add great campaigns and more characters. It's crunchy, so don't expect to fly through each room of the dungeon hacking and slashing as other dungeon crawlers do.
If you like the hand management of Mage Knight, you'll like the hand management of Gloomhaven, and Dungeon Alliance. Having played Gloomhaven and Dungeon Alliance, I can say that the hand management of Gloomhaven is a bit trickier, feeling more like a balancing act.
Both are great games.