Maxperson
Morkus from Orkus
No. According to 5e the source of magic is the weave. The paladin's oath gives him access to the weave according to his oath tenets(righteousness, vengeance, etc.). A cleric requires divine power from a god to access the weave.Paladin oath only makes sense if the oath is an actual container of power.
Like a blob or cloud of divine energy cast off from the Astral Sea or Gods actions.