Back in the 1900s, a threw a pair of 1", 100psi tires on my Gary Fisher mountain bike, added a rear rack, a handlebar bag, and a pair of Cinelli Spinacci bars on the flat bars and rode from Oakland to LAX on the PCH. With the Spinacci and the bar ends, I had plenty of hand positions. So maybe a set of short aerobars is all that the OP needs to find multiple hand positions. As with all aerobars, not great to use in traffic or busy situations, but sometimes all that you need for comfort is a little break from time to time from the same position.
One thing I've also noticed about Ergon grips is that proper adjustment is key. I try to set mine up so that my wrist is nearly straight; I see many setups where the wrist is bent pretty radically.