I think the same has been said of Damaio , and of course Wanyama doesn't really have to test himself week in, week out because of the standard of opposition (or so I keep reading). Perhaps none of them are good enough for us !!
MLT also was inconsistent over much of his career.
Of the three, I feel Banega might offer us more, attacking passing guile, dead balls, defensive duties. Although that is balanced by a gut feeling that he is also more likely to throw a strop.