But the WR had a lot of 2Es as well, in fact AFAIR apart from 2D FK and BFK most were 2E with some 2F
So if you buy Bachmann 2Fs you will need underframe components, roof hatch, some will require bigger door windows (2D sized), so whatever you choose work awaits.
2E TSOs as the most common
Airfix 2D, move a toilet window, reprofile bottom of sides, sand off door bumpers, may as well wire handrail it. EE frames work well
Hornby 2E, fit EE frames and LG windows, resize roof vents and that underframe
Bachmann 2F, two fan aircon unit, and another box which is missing, roof hatch
Which is least work for you?
As I do not need a lot and already have 4.5 Airfix based 2Es I am staying that way.