There are a lot of cards which can be good splashes. The best are Chiara and Plung (in my eyes). also there are a lot of defensive cards (Lola, Tiwi Ld) and "tactical cards" (Mahimatah/Romana) and beatsticks like (Tasty Tast/Nyema) or Power walls (Dreadlash/Qorah/Flush).
You could mention a lot of cards with 3 damage. Cards like Haaken (SoA), Kamekun/Rodney (Atk wall) and Shifou (SoB) could have a use in some decks, too.