My favs are a couple from the Paul Levitz/Jim Sherman issues.
Can't remember the issue numbers but the one titled "The Infinate Man Who Conquered The Legion" and the issue where the LSH fight these invaders with 3 legs and weird canine like heads who are lead by a gigantic brain. It is the lead up to the attack of the Khunds.
Actually all those issues were great. Just brilliant writing and artwork.
Whatever happened to Jim Sherman?

I remember him doing that "Steelgrip Starkey" series for epic comics and a few issues of various stuff here and there but nothing equeled his art of Superboy and the LOSH.