So the FI and I have been discussing asking his 18 yo godson to be our ringbearer. He would not be escorting the flower girls, but bringing the rings into the ceremony (a more refined attitude on the ringbearer idea rather than a cute toddler with fake rings on a pillow).
On the other hand, presenting the rings to the officiant is typically the best mans job, and it's not exactly a big enough job for two.
Then we also have a third hand, that since the flower girls (toddlers) will not be standing up with the WP, would it look weird to have the RB standing with them (ala junior groomsman)? It would leave the men outnumbering the women up front.