55 looking to upgrade to 75

[AxonEnding]

First post on MFK!

Currently have a 55g (1 Penguin 350 HOB and 1 Topfin Silenstream 70*came with tank* running) stocked with
1 Juvenile Green Severum
1 Electric Blue Acara
1 Bristlenose pleco
4 Red Eye Tetra (had more but have passed away due to age)
7 Brochis Splendens

Want to upgrade to 75 gallon. Questions as far as expanding stock around my main three fish if possible?
The other fish could be exchanged as needed. I love SA cichlids but know they can be territorial and stocking is not my forte. I am open to any and all suggestions/or questions!

Would/could add a canister filter to the 75 if more filtration was needed.

 

[Jexnell]

Cichlids wise maybe more Acara.

Definitely more Tetras.

 

[AxonEnding]

After adding tetras would the 75 be big enough to get another
1-2 Acara, OR
1 Severum, OR
Geophagus?
4-5 Bolivian Rams? OR
1 pictus cat, or Raphael cat?
I don't want to overstock I am relatively newer at this, tank has been running since August, cycled and added fish in Oct.