Any plants that are hardy in the ground will be hardy in the bog. This past winter was horrendous, that's why your plants didn't make it. I moved a very large (15' tall) oak tree last fall. It did great, had leaves on it 2 months after I moved it, but didn't make it. I think the roots had not established well enough for last winter. A typical winter it would have made it. Same with your bog plants. Some probably were not established enough to make it through last winter. Try them again, bet you will have better luck. Doesn't have nearly as much to do with the water as it does with the temperatures. I'm tempted to try hardy hibiscus in the bog! I probably would put it in a pot, so I would know for sure where it was. I know they like wetland situations. Have some seeds I grew, so may toss them in a small pot, see how they grow and go from there.
How about Cattails? I could send you some, mine are variegated - green/white. They do spread, but in a bog, with pea gravel, just grab, shake side to side, and they pull right out. They grow about 3-4' tall, and are VERY sturdy in the winds, long as they have at least 10-12" of gravel to root in. Other nice plants are rushes (horsetail rush). They are hardy, come back every year, but maybe these last plants are taller than you want to see.
It's just been a really windy spring, seems every day is 15-25 mph winds here lately, too!