I would go with fairy types. My team would be Sylveon, Tinkaton, Gardevoir, Galarian Rapidash and Flutter Mane.
My reason for the team is that I really like the design of them and I just like them overall. They can also receive and deal a huge amounts of damage. Sylveon have almost exclusively managed to carry me through the games.
What you forgot to consider is that the Xbox has to share the RAM with the VRAM. The game on PC has 8GB RAM and 4GB VRAM as minimum. That is 12GB of RAM. The Series S only has 10GB. Which is 2GB less than minimum.