You can bring a character into an Iclone project and choose 'Edit Motion Layer' to pose it. You can change a character's proportions using sliders in Character Creator.
Essentially these manipulations of characters are what Poser was designed for - as well as adding clothing, hair and prop items before rendering them in a scene.
Now, there is much, much more to Poser than the above but it isn't primarily an animation program - even though some absolutely wonderful animations have been created with it.
I like Poser very much, though I'm still pretty much a beginner with it. I recently bought Poser 2014 - the Pro version because Poser 10 was 32-bit but I'm too new with it to wish to move to Poser 11 just yet.
I can't speak for Poser 11 but the versions I bought came with an excellent manual, tutorials within the program itself, a quick-start guide and there are tons of tutorials online.
Just as in Iclone you need to know about imotions, iprops, etc. there is a whole world of Poser terminology relating to file-types for poses and so on and also for the composition of the characters.
Many people seem to dislike Poser, which I haven't understood - although the free DAZ alternative has many attractive features and generally better figures.
Both DAZ and Poser have huge content markets catering to every genre. It's possible to spend a lot but prop items bought can be used in Iclone via 3DXchange.
At one time Poser and DAZ Studio, as well as Carrara could use each others' figures with only a few texture tweaks needed (so I believe). Now Poser's newest figures don't work well or at all (?) in DAZ Studio. DAZ's figures are seemingly becoming very difficult to use in Poser (I believe, but stand to be corrected). To use Poser, Carrara and DAZ together, it is probably best to stick with the older Generation 4 figures.
Poser figures can be used within Bryce landscapes for static renders but can be Posed for animation in some versions of Vue. Vue's landscapes are probably second to none but it takes a lot of computing power to use, it can get to be very expensive and can only be used with Poser if both (memory intensive) programs are open simultaneously.
When alternatives to Iclone are explored, it has to be said that Iclone has a lot going for it!
Lastly, it seems that nothing new has been added to Poser's animation tools over the last few releases. Perhaps you could pick up a copy of an earlier version than version 11. That new version will have teething problems, for sure, until service packs are released.