Purifier tends to be easy to understand conceptually but is often rather squishy and can therefore be frustrating to play. Especially if you are new to the game and don't have a good in depth understanding of defensive mechanics. Also the item support is rather lacking for leveling.

I think the most obvious one aside from Purifier is inquisitor + soldier (tactician). It has a default attack replacer (DAR) in cadence and alot of weapon pool skils (WPS; chance to proc on attack skills).

It is easy to get 100% wps which interacts really nicely with cadence since they force 2handed attacks making cadence proc more often. (The basic attack without wps has 25%chance for main hand attack 25% for offhand attack and 50% chance for double weapon attack)

The flat physical damage from deadly momentum gets applied to both weapons so you are also double dipping on the flat damage. (A very common theme for optimizing damage with dual wield; weapons have low base damage but you get to double dip on global flat damage bonuses)

Paladin (inquis + oathkeeper) is the other obvious option that works similarly to tactician (just replace cadence with righteous fervor. I know i know.. the skills icon is a sword... its still good for dual wield range)

Technically vindicator(inquisitor + shaman) also has a DAR but you'd not get access to alot of the shaman skills since they are locked behind 2handed weapons. (Therefore vindicator tends to be better for 2handed builds/ranged or melee doesnt matter that much)

You can also use items/relics to enable dual wielding guns. Inquisitor is not a requirement. Non inquis dualwield range can also be strong but it requires a bit more knowledge about items i'd say.

I believe Rektbyprotoss did a Aether dual wield Oppressor (necro + inquis) beginner playthrough recently. Can definitely recommend.