A link to a nicely painted version of the old Ral Partha Frost Giant above.
Another pic here from the Stuff of Legends website. Also has a pic of another nice mini, the Storm Giant that Paul of The Man Cave mentions -
RP01-090 Storm Giant
For Paul of The Man Cave here is the Grendel mini by Ral Partha -
Love this! Can't imagine how difficult it would be to get hold of this one though...