I would get at least one to go with your tama go. I would recommend kutchipatchi, violetchi, or mametchi. You can get them pretty cheap off places like ebay, but make sure you're not getting lite figures (lite ones have a white base.)
I did some research to see what each figure does-
Kutchipatchi: Chinese restaurant, Flag game, Vegetables game
Mametchi:Toy shop, Hip Hop game, Speed Runner Game
Chamametchi: Clothing Shop, Panel construction game, Shuffle Shuffle game
Ringotchi: Sweets restraurant, Monster beater game, shape sorter game.
Memetchi: Clothing shop, Panel match game, Hit a note game
Violetchi: Flower shop, Bounce back game, Manhole game
Sebiretchi: Mexican restaurant, trampoline game, farmkeeper game.
Kuromametchi: Sports shop, Balll matching game, Driving game
Shimashimatchi: Electronics shop, Gap & Gap game, Hip Hop Game
Makiko: Travel Agency, Sound Block game, Shuffle Shuffle game
Ichigotchi: Cafe Restaurant (bread/soup/salad), Knock a note game, Candies game
Ponytchi: Makeup shop, Manhole game, Hunting Game (?), Manhole Game
I think that's all of them! If I were you, I would get a nice mix, like 1 restaurant and 1 shop. Hope I helped!