If you want decent performance in Dolphin, Intel is the way to go (the cheapest route for full speed in practically all games is Pentium G3258 + OC and a compatible motherboard). But from a quick read it seems that you're tied to AMD because of your current motherboard, in that case, I don't know what to recommend to you since I don't have enough knowledge of AMD lineup...
Avell A70 MOB: Core i7-11800H, GeForce RTX 3060, 32 GB DDR4-3200, Windows 11 (Insider Preview)
ASRock Z97M OC Formula: Pentium G3258, GeForce GT 440, 16 GB DDR3-1600, Windows 10 (22H2)
ASRock Z97M OC Formula: Pentium G3258, GeForce GT 440, 16 GB DDR3-1600, Windows 10 (22H2)