These are just some ideas I had floating around for main missions. They would probably need to be tuned to whatever rules system variation you are playing.
Escort - Escort a person of interest to the objective, alive. Choke Point - 1 VP for each friendly unit to cross a vital choke point (exit from table) unscathed. Experimental Weapon - Relic Hunt, but seized objectives imbue their carriers with extra abilities. Fortress - Prevent the destruction of a key stronghold (With some appropriate Tough value) Scorched Earth - Kill civilians/prevent civilians from being slaughtered. 1 VP for each saved/lost. Recommend 6(?) Hostage Rescue - Extract a hostage (Tough) from within enemy territory, alive. Mercenary - Activate a super soldier from stasis, they join whoever activated them for the remainder of the battle. (Sum total units killed to determine winner, however the Mercenary's point value also counts if killed.)