Well, here are a couple more examples of Pokémon that will make best circles. It really isn't too hard to make a best circle. Considering that a lot of Pokémon have dual types, that gives you a lot of wiggle room. You can always play around with the circles a little bit, and you should be able to come up with something. But anyways, here are some more examples... Ground, Fire, Grass, Water will make a good best circle. Try to get a couple of best circles using those types. (Example: Baltoy, Growlithe, Roselia Golduck)
Ground, Electric, Flying, Grass is another good choice. (Marowak, Ampharos, Pidgeotto, Weepinbell)
You can also try Psychic, Fighting, Dark, Ghost. (Hypno, Makuhita, Carvanha, Banette)
Fire/Ice/Grass/Rock
Fighting/Steel/Ice/Flying
Electric/Water/Ground/Poison
Poison/Grass/Water/Fire Umm, fire isn't super effective against poison
There are lots of combination that will work, many more than I have listed here. Just remember not to use pure Normal types (Part Normal types will be ok though) when forming a best circle, as they don't have any type advantages.