I'm sure this has been done before but I haven't seen one for BTS. My favorite leader is Willem Van Oranje of the Dutch. Although his UB the Dike (+1 for each water/river tile) comes only after researching steam power, it's a huge production boost if you play any kind of water/island map. His UU (Indiaman) is very underrated - a transport ship which ignores cultural boundaries. I usually load a bunch of them with units and park the boats right next to enemy cities, declare war, then unload my units. City razing commences right away!