Hanuman ji is Sankat Mochan.
Hanuman ji is Pawan-Putra.
Hanuman ji is Ram-Doot.
Hanuman ji is Maa-Anjana-Putra.
Hanuman ji is Guru of Pehelwaans.
Nobody can control Hanuman ji but Hanuman ji controls Kalyug under the power of Shri Ram, an Avtaar of HARI as mentioned in Holy Scriptures.
Person who recites Hanuman Chalisa always excels as power of Hanuman ji helps that person.
The best MANTAR(s) of Hanuman ji, according to me is as following:
OM SHRI HANUMATEEH NAMAH
JAI BAJRANGBALI
KALTANTU KARYACHARANTI ANER MARISHNU NIRMUKTE KALITVAM AMARISHNU (कालतंतु कारेचरन्ति एनर मरिष्णु, निर्मुक्तेर कालेत्वम अमरिष्णु).