Ohr Chaim in my backyard, 18 Forshay Road. Starts with Netz until 10:30am. Continues with Mincha at 1:30pm, 12 minutes before Plag followed by Maariv, 12 minutes before Shkiya followed by Maariv, and then 20 and 50 minutes after Shkiya. Mario is from 7pm until as late as 12:45am.
The big minyan factories in Monsey are Vishnitz and Skver, although I think Satmar has one as well.
New Square is not in Monsey. So if the OP wants or needs specifically Monsey then it’s Viznitz or Satmar in “old” Monsey. And as Efraim said Ohr Hachaim in Forshay.