The D&D 4e Character Builder is awesome.
You get all of the options from the books and D&D Insider content, allowing you to easily make characters with as much creativity as possible.
In order to inspire you (and show off my creations), I will display my characters, both the unusual and impressive.
A bow as tall as a man, then make it bigger.
Basically, you take a bugbear, give him a ranged weapon based class, give him the great bow proficiency feat.
This idea used to work with minotaurs and bugbears, but minotaurs lost their "Oversized" race feature when they got promoted to player race status.
Several classes work with this: Ranger, Seeker, Artificers, and Bard have enough ranged weapon attacks to make this effective, but classes that use dexterity as their attack mod work better with the bugbear. Avenger and Rogue both have At-will attacks that work, but lack any more ranged weapon attacks (at least that work with a greatbow), but if you only want ranged attacks, a hybrid class with avenger could work. Hybrid and multiclassing can work, but you may have to spread out your points more.
The ability scores depends on which class(es) you choose, put points into whatever ability is used by your attacks.
Pick whatever skills you like.
The only required feat is the "Proficiency: Greatbow".
Pick any powers that can use ranged weapons, if none are available, pick what ever suits you (or your character).
A large Greatbow and whatever else you want.
Here is the Iplay4e preview.
These options are not limited to the whole package, of course. you could simply make a hybrid class that merges two ranged classes. Maybe a bugbear that wields some other HUGE weapon.
If you have a question, comment, or suggestion, I would love to hear it! If you liked my idea, would like to expand on it, have a similar idea, or want to suggest something else for me to explore and post about, leave a comment!