BEST VITAMIN(S)?

Recently realized mine has aspartame in it and am almost through with it anyway. Looking for a good multi-vitamin (preferably chewable).

Just something that will 'cover all the bases' in terms of keeping the immune system healthy by complementing my diet (which usually consists of lean protein, veg, fruit, whole grains, the usual).

Any advice/suggestions based on what you guys and gals currently take?

Thanks in advance.