Since this is the "Evil" playthrough and the current companions are of evil and chaotic alignments then we at least need an equal number of Good companions. I mean, if I was playing a Paladin then none of these companions could work in that party.
On a side note, I would love a paladin companion who sees through Wyll’s pretense and false righteousness. I would totally travel in that party just to wait for the powder keg to go off.