Ive already got a few things like the lich gedna rlevel or something, i got vivec, almalexia (7 and a half million oh my god), i got imperfect, and i got a few random monsters that "help" you. Anyone knows some famous monsters/people which i could soultrap and add to my collection?

You cannot soul trap people. In the game they presumably have no souls. I'm not sure how many unique monsters there are but some dagoths can be trapped, Staada the golden saint, perhaps the Udefryktye in Bloodmoon. You might also try Giant Karstaag, Hircine, Aesliip and any named non-human character.

I don't know whether these are possible or not but another poster might.

i don't really mean "people". I mean monsters that look like "people" like vivec and almalexia. Or any other special monsters of which there is only one in the game. I already got a few from solstheim, a monster called "swimmer" who leads you to a cave during a quest. When i arrived there i soultrapped and killed him. Or the white guar.

You mean my ex-girlfriend? Jokes on you, she doesn't have a soul.

You could go to the cave at Mount Kand, I believe, and trap the three deadra that ask you the questions. Or you could go and do the Deadra quest where you have to kill the guy’s daughter. I am very bad with names of these people or monsters, but I’m sure some one here knows who and what I mean.

It probably isn't worth much, but why not soultrap rollie the guar? he's as unique as any of those, you know, on the basis that he is the only named guar in the game. i say, that's the only thing he is good for

I suppose there is also the "white guar."

And Corky.

can u soul trap a werewolf?

No, I highly doubt it...as they are not unique creatures.

At a moment i totally freaked because my almalexia, vivec and gedna something soul were gone. I searched trough all the houses i dumped stuff in. After a while i remembered i did some crime in mournhold. So i went to the evidence chest, taunted and killed the guards, opened the chest. And there were my enchanted gems, together with some grand soul gems without a soul.

It seems guards always take your soulgems as "evidence".

Molag Gruna and Nomeg Gwai

Other named unique Daedra include Krazzt (puzzle canal) and Anhaedra (Maar Gan shrine)

You can't soultrap Anhaedra, I'm not sure about Krazzt.

Hmm... let's see... Vivec, Almalexia, Gedna, most of the Ash Vamps, Ascended Sleepers, and Ash Poets, Karstaag, Swimmer, The Good Beast (bloodmoon quest bear), Hircine's Aspects, the Imperfect, Rollie, Corky, and White Guars, Gruna, mudcrab merchant, scamp merchant, Hrelvesuu (daedroth in fighters' guild quest), Yagrum Bagarn, the Giant Netch, possibly the Spirit Bear, and the Udyrfrykte are all unique monsters that can be soultrapped. Don't ask me where they are or, in the case of the gods, how you can beat them.

Darhk Mezalf the Dwarven Spectre,
Not sure if I spelt that right...anyway, he is part of a Telvanni Quest for Baladas, but he is still active if you aren't part of Telvanni. Also, there is a Daedroth with a name in one of the Fighter's Guild quests from Balmora.

Nope. Game mechanics do not allow it.

Can't soultrap a werewolf cuz technically they're still NPC's, right? After all, the PC can transform into one...

How about the Gateway Haunt? Its soul is pretty valuable/powerful and it always respawns(unless you've already done the quest to get rid of it).

What about that Radac Stugnthumz guy who helps you re-enchant Trueflame? Seems kind of cruel and back stabbing, but you can use him to make a nice enchanted item.

you can with torgulfs npc soultrapping mod

Wow, a vivec soul gem... now thats something to behold. I bet you could make a summon out of that, vivec as a summon... woah...