If you want aggro, predatory-type fish: perhaps a harlequin tusk? Really pretty, but can get rather large, perhaps even too big for your tank.
The biggest thing to keep in mind with large, aggro fish: They are super messy and tend to get rather large, meaning you can't keep as many as you would like.
I know of no one who would suggest it, but I always thought of setting up a damsel-only tank. Many people and LFS look at damsels as throw-away fish used to cycle tanks, but, they come in a variety of colors and are as aggressive, pound-for-pound, as any fish out there.
You can also look in the wrasse family - there are dozens to choose from. Dottybacks (bi-color and stawberry) are very colorful and while small, pack a punch for their size. You could also look at the angel fish which are awesome - they change colors/patterns from juvie to adult. They can get pretty big, so there is a good selection of dwarf angels to choose from (flame, coral beauty, etc).
Bottom line is, there are literally hundreds of fish to choose from. I would identify a few that I like and then do as much research as possible to make sure they're compatible.
As for setup: The bigger the skimmer you can get, the better. I had an remora pro on my 90g. I probably could have used a larger one. Get a ton of live rock - will help tremendously with biological filtration. I would suggest spending as much money as you can on lighting because even though you say now you don't want corals, trust me, you're going to want corals. And those corals will need intense lighting. T5 and LED are all the rage now, but metal halides are the workhorses of coral keepers.
And the most important advice I can give: BE PATIENT!
Man, I hope you have a lot of money!
Good luck!