Spouse 2 x Children Bard Carriage Driver Housecarl (for the region the home is in) Steward...
So there are 7 people who can permanently reside in your home, excluding yourself, but by exploiting bugs to gain extra followers you can have a great deal of people defending your home from attacks :) --- Gamer Tag - Aldora92 - bloodgod91 Currently Playing - Mass Effect 3 - State of Decay
It mainly involves keeping quest related NPCs around, exploiting the extra followers (who do not replace your main follower)
There is a list of them here: http://elderscrolls.wikia.com/wiki/Forum:Skyrim:Multiple_Followers
On top of that list, you can have your main follower, Shadowmere (or any horse) and the Spectral Assassin (from the DB quest line) I am unsure of how summoned creatures work, if they cancel each other out as I have yet to actually use magic :| but if you bring all of them to your homestead where you already have a horse waiting, which is another friendly combatant, you will tear through any attackers :) --- Gamer Tag - Aldora92 - bloodgod91 Currently Playing - Mass Effect 3 - State of Decay