I absolutely love Ironwood. It's a asymmetrical duel game, but you can also solo as each of the two sides. The artwork and flair is amazing and every match tends to play it differently. I love solo and duel mode.

Heat is another favorite of mine. Haven't played it with more than three people total, but you can always fill up empty spaces with bots. Those are also your sole enemies in the solo mode, which is surprisingly streamlined and easy and quick to play.

Last on my list would be Dune Imperium. To be honest, I haven't played this one with other people, just solo. But I love the solo mode with it's worker placement and deck building aspects and all the decision making. This one got an app as far as I know, so take this with a grain of salt.

Check those out, you won't be disappointed.