would you have a problem no... is it best for the fish??? imo no. its not about your water parameters as i could keep a oscar in a 10g and do extra water changes and keep the params in order. its what is best for the fish and with small schooling fish like them its best to give them as big a school as possible. also imo 2 schools looks funny sometimes especially in a small tank.
8g Fluval 1M CT Betta
125g 5 Blood parrots, 1 Green Severum, 8 Dension Barbs, 10 Yoyo Loaches, 1 RTS
75g Angelfish, 3 EBGR, 4 Siames Alage Eaters, 12 Harlequin Rasboars, 1 BN Pleco, 1 Swordtail
33g long cherry shrimp, 8 pygmy corys, 5 ottos
15g 2 GBR