depends really what tyrant you want to match a licker up against.
the licker has speed, the agility to climb walls etc, and a tongue that can pierce the body, and if it was RE3 nemesis..then if he was equipped with his rocket launcher, then nemesis would wipe the floor with a licker, but when i think see "tyrant" i automatically think of RE1 tyrant..so thats what i based my answer on..
and to answer your new q, alexis.
ermm.....carlos vs billy
EDIT: my bad, didnt realise there was an answer being posted same time as mine (A)