Low Horn 5 is the big daddy of the Low Horns. There are four distinct summits, each of them almost as significant as Low Horn 3, plus another minor summit on the south side (maybe call them 5.a, 5.b, 5.c, 5.d, and 5.5?). 5.d is the tallest, but only barely taller than 5.c.
Gaining the summit of 5.a from the north is barely more than a long scramble, but one short move might drive you to rope up. Scrambling from 5.a to 5.d poses a few interesting challenges, and a few of them might make you want the rope too.