I've been googling this, hoping to find one that actually works. All I've come up with is ones that make quest companions stay with you, like Farkas. I really don't care for them. I'd rather have both Jenassa the Ranger and Marcucio the mage. However, as of now I can't have them both. I wouldn't mind having Mjoll too, considering that would make an awesome party IMO.

I tried one on Steam, but it was still WIP, and didn't work. If someone can do this, it would be amazing I'm sure for many of us.

Thanks.

http://www.gamesas.com/topic/1345602-wiprel-multiple-followers/

-Starcrunch

I'll see if this works, thanks.

You can use my mod , you can recruit multiple and any Npcs and manage they.

http://skyrim.nexusmods.com/downloads/file.php?id=10559

Thank you, I actually tried that, and I noticed that unlike a normal follower, they don't get tagged as essential. Like, I can kill a potential follower before I hire them, like Marcucio, but when he's hired, he's immortal. This mod still leaves him in the former.

There are 2 versions , protected mode and normal, with first they are like vanilla followers otherwise in normal version they can be killed.

Tried it, and afraid it's still the same as the normal version, considering they can still be killed. Might want to look into it for yourself. Sorry for the trouble.