No, no a thousand times no.
Most of these points have been made by others, but I will reemphasize them again in the hopes that hearing it from a Pacers' fan might make some of you wake up and smell the river.
1. Artest is not a malcontent or a "bad character guy." He is mentally ill. It is probably "just" bi-polar disorder, but he can be completely unpredictable. Sometimes he even forgets what he has done or said during one of his "manic" phases.
2. Artest is somewhat overrated as a defender, because neither Indiana or Sacramento were/are good defensive teams.
3. Artest's offense has a tendency to disappear when an above-average defender covers him. This is why he often chokes in playoff games. He is neither a pure shooter nor a reliable post player.
4. Comparing Stephen Jackson to Artest is laughable. There is no comparison. Jax is a bit of a malcontent who can pull it together for the right team. Jax has bad judgment and poor impulse control, but otherwise holds it together. Again, Artest is mentally ill. Jax + good intentions = championship. Artest + good intentions = Still ing Crazy.