First, uninstall Dragon Age: Inquisition.
Then, install Dragon Age: Origins.
After that, choose a mage class or a dual-weapon warrior.
Are you kidding me? DAO had a lot going for it, but "fun combat" isn't something I'd say it did well. Tactical, but not always fun. Also, don't be a ******.
On-topic: I'm having a lot of fun on two-handed warrior, charging in their then using mighty blow (Charging Bull + Might Blow = death) is fun every time. Sword and shield is really fun to tank with: Using Shield wall without pausing is very satisfying.
Mages become really fun once you unlock a specialization, I prefer Knight-Enchanter. Rogues are by far the hardest to play, especially the DW rogue because you're squishy but melee range and you don't have guard. Still, its a fun class.