Another way to deal with issues like this is organically. What I've done on occasion in the past when there were a multitude of answers to a users question is try to point them directly to the one I thought most likely helpful as in for 16.04 try this answer or this one. By driving people to the correct answer votes on those answers will increase over time. This approach has the benefits of not requiring any mod intervention and sidesteps the possible issue of stepping on the intent of a highly respected answer. The downside to this approach is the time it would take to become effective could be extensive.

Another way to deal with issues like this is organically. What I've done on occasion in the past when there were a multitude of answers to a users question is try to point them directly to the one I thought most likely helpful as in this example. By driving people to the correct answer votes on those answers will increase over time. This approach has the benefits of not requiring any mod intervention and sidesteps the possible issue of stepping on the intent of a highly respected answer. The downside to this approach is the time it would take to become effective could be extensive.