Everyone I play with takes a Horde formation, so in order to last long enough in combat, I'm forced to take Hordes of State Troops and Great Swords, whether I want to or not. I've lost far too many a game because my guys ran, and thus were chased down, because a Horde of "X" chewed through 2+ ranks of men men and snake eyes or slightly better was needed to avoid running.
I've had great success with a Horde of 48 GS, BSB, & an AL. BSB is, of course, built to the hilt for Armor and is given the 4+ Ward while the AL's gear changes time from time, but VHS is always on there. This unit ate through about 500 points of WoC Heros and a unit of Chosen one game. It single-handedly won it for me by holding up his Elites for 4 turns, allowing me to roll his flanks.
I've also toyed with a 10x12 unit of Swordsmen. The idea being you tie this in with a Horde of GS and have two stubborn units. The Swordsmen Horde is more for holding up more powerful units so the GS Horde can roll into the flank. Yes it's big, I know. It's a fun idea and really only for kicks, but the look on the opponents face is priceless as I've played it once, and it helped me win my game by doing just what it was supposed to do.