As far as confirmed Echo users, no, neither Alphinaud nor Alisae possesses it. The player, Minfilia, and Ysayle were the only named characters so far that we know of. That being said, some of the other pre-Garlean invasion Scion members had the echo as well, as the point of the Scions was to grow their ranks with members of similar abilities. That's part of the reason you were recruited, and part of the reason Minfilia started the Path of the Twelve to begin with (which was merged with the Sharlayan gang after the Calamity).

Sadly, many of them were killed by Livia and her lot. Some survived and we can assume that some of them have the Echo, we just don't know who or what since they are unnamed background NPCs at this point.