Has to be... MGS homes many WAP-4s, WAM-4s and in Diesels they home WDM-3A Locos... some of their WDM-2 Locos were seen in freight train duties some years back but the WDM-4 EMD Locos were the Stars of MGS Shed for trains like the Howrah Rajdhani (Via Dhanbad) especially during it's Maiden 1969 Run but during the 1990s, these locos were last found doing Freight Train duties on the
Lucknow - Saharanpur Route... by Late 1990s many of them were turned shunters and
lastly by 2000s more then half of them were scrapped and rest of them were plinthed in some Railway Museums across India :-p