I don't know of one where it is designed with the intention of the shorter person controlling the bike. The Bilenky Viewpoint (formerly Opus Counterpoint) tandem puts the "stoker" up front on a recumbent seat, but the person controlling the bike is the "captain" on a regular diamond frame. And in the "old days" they had "courting tandems" where the woman rode in front and the man in back, and he controlled the steering and braking from the back.

That said, if the weight variation between the smaller and larger person is close enough that the smaller is strong enough to handle the bike, there is no reason that on any tandem the smaller person can't be up front. The strength required to handle a tandem is definitely larger than a single, but not by as much as a person might think. Basically, the only time you'd ever need really significant strength is if you make a mistake as captain and get the bike tilted over with the stoker still on it. I've had a few occasions where I've stopped abruptly and had the bike get off balance and had to be quick and strong to recover. Also, there can't be too much of a height discrepancy, or a bike that is sized for a shorter captain will be hard to fit to a taller stoker.