Quite a bit of freight around Doncaster...
Between Leeds and Wakefield Westgate, you will get 144s, 158s, 321s all doing commuter runs - 144's via Huddersfield, 158s (2 car and sometimes 3 car) usually onwards to sheffield, and 321's stopping services to doncaster, all run by northern
220/221 which Cross Country run on services to the south, and the north - some run via doncaster and onwards to sheffield, others turn off at Moorthorpe and straight to Sheffield
Hull trains run an Adelante and a 222 Between Kings cross and Hull, thi adelante is in FGW colours, with the FGW strip saying Hull Trains, and the 222 is in Hull trains livery
South of Peterborough, you may again get central trains 153's, 156's' 158's, in a variety of liveries, then you have 365's running stopping services to Kings Cross, and some via the Hertford Loop, some run non stop between Cambridge and Kings Cross
You also have 317's which again run stopping services between Peterborough and Kings Cross/Moorgate again - sometimes via the Hertford Loop, and all these services are operated by First Capital Connect
Grand Central run a 5 Car HST non stop from Doncaster onwards to Kings Cross, and as Techniquest said above - the other main classes on the line are the 43's and 91's operated by NXEC
I'm not sure if thats every item of stock you may find... But fairly close... I'm hoping...
EMT occasionally run a few services south to Leeds