[@BlackSam3091]I kinda bounced about a bit for my class preference.
Infiltrator on ME1 because of medium armour, and access to snipers- as well as the fact that you got electronics which was broken asf.
ME2 was a Setinal, because why bother dying when you can go Tech armour and fortification?
Just sit there laughing at enemies as they tickle you on Insanity.
And finally ME3 was vanguard, because biotic charge is hilariously fun to use.