Popeye is also a horizontal game while the others are vertical. QBert wants 30 volts and -12 volts, while the others want -5 volts. I believe you have to do some conversions to a pac-man board to even make it play nice with anything else since it normally takes AC power to the edge connector.
Qbert doesn't really play nice with anything. It needs an angled joystick and what you will pay for a working Qbert circuit board with working sound gets you about 80 percent of the way to the purchase price of a whole machine (all the way there if you can snag a deal).
I have a Ms. Pac-Man with Mike Doyles multipac kit installed. That is a pretty decent solution if you want to avoid emulation. It gets you Pac, Ms. Pac, Pac-Plus, Ms Pac-Plus (fast and slow versions and a zillion variant mazes of all of the former), plus Super Pac, Pengo, Caterpillar, Pacrabbit, Space Invaders and Pirahna all running on an original Pac-Man circuit board.