[Aerich]

The paladins get a +2 AC from their protection from evil that stacks with other PfE spells - in that sense, a paladin gets a +2 boost that no other class can attain. Paladins also get +2 to all saves (useful, especially early). Not least, paladins can boost their defensive capabilities with priest spells. Draw Upon Holy Might is as much of a defensive spell as offensive. A very high level paladin can cast Entropy Shield.

There is nothing to prevent having a pally and a F/M in the same party. A multiclass F/M will generally have fewer HP and be more reliant on short-duration spells. A F/M also needs spell scrolls, which might be an issue if you already have one or more arcane casters.

I disagree on your point that F/T make good tanks, for HoF anyway. No self-buffs and less HP than a fighter. F/Ts are better as archer specialists and occasional (emergency) meleers.