I've been working on this again this evening and here's what I've accomplished so far. I might lengthen the height of the canvas a little because it seems a little short to me but then I'm not used to working in 16:9 ratio so that might be it. I usually work in 4:5 or 5:7 for sake of easy printing. I do like the extra width though.
Here's what I did besides changing the canvas' ratio:
1. Moved Indy over to the right and back a little ways. He's now resting his foot on the broken pillar so he's slightly raised above the ground. I also adjusted his head and eyes to focus on the tiger from his new position.
2. Added a second light just to illuminate Indy.
3. Moved the camera around to the right and then upwards via the x-axis.
4. Turned on depth of field.
5. Increased the brightness of my "sun" light and increased the strength of its shadows slightly.
6. Repositioned the tiger slightly and moved its paw up to bare its claws for a little extra action.
7. Moved the snake over because it looked like it was too close to the tiger with everything else that was moved.
8. Postwork was completely different. Just added a curves and color balance adjustment layers.
This is definitely looking WAY better than my original!