Erskine would be best of the 4 choices but I doubt he would accept. Howard Stark would be a terrible choice, as would the general. My choice besides or in addition to Steve would be Peggy Charter. Which if they were able to "rendezvous" before he went into the ice & she had his kid that would be interesting. But if not she would still be a great substitute while he was in the ice. Especially since she would still be young & having out lived her Husband they could reunite upon his return to duty.
Howard Stark
Abraham Erskine
John Flynn
Someone else? (Mention in the comments!)
