It's hard to say actually. From experience it can get really tricky multi boxing more than 1 class if you don't have prior experience. But with enough practice you could effectively control them.

Other than that it is up to you on how you play. Paladins make great tanks (even holy specced) and with righteous fury they can tank while healing and can give you a standard rez if your instancing.

I wouldn't transfer the paladin to a new account though. $25 transfer isn't worth it if your level 36.

How is your current accounts setup, assuming you have only 3 right?
If your current setup is what I think it is:

(Main) lvl 70 char, lvl 38 pal, lvl 19 druid
(2nd) lvl 19 druid
(3rd) lvl 19 druid (this would be the one with wrong name)

Then I would suggest replacing account 3 and rolling a druid. That way you have your choice of either a druid or paladin. Assuming you have the above setup (if not post it).