The Chitauri army from The Avengers vs 6 horror movie villains of your choice.
No reality warpers-No Loki
Horror characters have knowledge of The Tesseract and The Scepter, which is hidden in the city. Civilians are in the city, but the teams goal is to defeat the Chitauri, not protect the city, so collateral damage s a non-factor.
Can it be done?