I have an almost identical playing strategy to you. I really think the key trait for you is Financial, with the single caveat that you might want to try running a Specialist Economy one day: It's fun, gives you a huge early-game tech lead and lets you spend your money on other things, like espionage or the culture slider to counter war weariness from warmongering with Colosseums and Theatres. Financial doesn't help much with it, though, since you aren't farming commerce.
Like many others on this thread, I highly recommend William of Orange. Creative is much better than some give it credit for. In the early game, Creative not only makes expansion a breeze, but it lets you peacefully squeeze neighboring civs off of strategic resources (Creative + cheap Library = major culture advantage to a newly settled city), as well as helping you extend a city's cultural borders to those resources lying just outside its fat cross a lot faster. It has an awesome array of cheap buildings, too.
In the late game, just as you're about ready to launch your offensive, the incredible Dike comes online to give your coastal production cities a HUGE (and uniquely Dutch) production boost. In a coastal city with Moai Statues, coastal squares provide 2 food, 2 hammers and 3 commerce, which is just stupidly good.
The only shame is that your peaceful early-game strategy will underplay the East Indiaman (Dutch unique unit) which is a BEAST and tends to remain so for a long time. I tend to do the same though, and I don't find myself hurting too badly. Further, you begin the game with neither of my two favorite opening techs (Mining for early Slavery, tree chopping, Masonry, Great Wall, Pyramids; Mysticism for +happy buildings, early religion, Oracle), so you can't really hope to found an early religion unless you want to delay Slavery, which I don't recommend. Of course, whenever I start with these techs, I always end up missing Agriculture (expensive) and Fishing (makes getting Sailing even MORE painful). I'm rambling, so I'll stop ;-)
I also like Hannibal of the Carthaginians because my particular playing style always underplays religion and the associated early +happy buildings. It's kind of strange to use his Charismatic trait primarily for the +happy (instead of the cheap promotions), but I'm nothing if not strange. ;-)