Sam Curran has only shown up in an England shirt in a few games against India, in Tests and ODIs. Otherwise, a lot of pretty minor contributions. Two wickets per Test as a main bowler?
Before Morgan got hold of the ODI side, England had lots of ineffective guys playing in that form. Owais Shah, Luke Wright, Ravi Bopara, Jade Dernbach. Loads of caps, a couple of decent performances apiece.
My favourite is probably Jamie Dalrymple. 14 wickets in 27 ODIs, a couple of fifties.
On the flip side, James Tredwell was an excellent performer, replacing Swann. Underrated.