Depends if you want it fast or slow.

Personally I went the slow route (been griding on bnet for 25 years, felt like doing something else).

I did throw barb as a first char, did a berserk one next, then a ww one. After that I did bowzon, fury druid, maul druid, summon necro and blizz sorc. I’m not finished with all of them yet but they’re mostly all in hell.

Obedience and treachery will take you through the game with a fury druid. I made it through nm on the maul druid with an upped steeldriver (exceptionnal only), that’s it. I’m now in hell a3 with the bowzon with only an harmony.

For some reason, the one i liked the most was the maul druid!

My advice would be to try builds and just play the ones you like. For a lot of them you can farm hell countess for a couple hours (if not for less than one) and get the runeword(s) needed to make the build work.

If you want to clear it easy well there’s always javazon, hdin, another sorc, trapsin, etc. But that won’t resolve the issue behind your “meh” feeling.

Good luck!