Homebrew
Brave. The gladiator has advantage on saving throws against being frightened.
Multiattack. The gladiator makes three melee weapon attacks. It can replace one attack with a use of Shield Bash.
Shortsword. Melee Weapon Attack: +7 to hit, reach 5 ft., one target. Hit: 11 (2d6 + 4) piercing damage.
Shield Bash. Strength Saving Throw: DC 15, one creature within 5 feet that the gladiator can see. Failure: 9 (2d4 + 4) Bludgeoning damage. If the target is a Medium or smaller creature, it has the Prone condition.
Aggressive. The gladiator can move up to its speed toward a hostile creature that it can see.
Any Climate; Any Terrain