Note: this is not a definitive list, just what I think about how canon the different games that feature Miis are. It's also worth pointing out that this only counts Nintendo published games.
Mainline
These games all have Wii in the name.
- Wii Sports
- Wii Play
- Wii Fit
- Wii Chess
- Wii Music
- Wii Sports Resort
- Wii Fit Plus
- Wii Party
- Wii Play Motion
- Wii Party U
- Wii Fit U
- Wii Sports club
Secondary
You can only Play as Miis in Secondary.This also has subseries.
Tomodachi/Miitopia
- Tomodachi Collection
- Tomodachi Life
- Miitomo
- Miitopia
Other
Tertiary
This category Stars Miis as main characters, but are tied up in licenses/Other series
- Big Brain Academy: Wii Degree
- Personal trainer: Walking
- NHK Kōhaku Quiz Gassen
- And-Kensaku
- StreetPass Mii Plaza
- Pilotwings Resort
- Nintendo Land
- Wiii Karaoke U by Joysound
Quaternary (all other games)
This is all other Nintendo Published games that feature Miis. I am not going to list them, as I don't think they count at all in the 'Wii' Series.