Gigas is so much fun. He's awful, but he's fun. Completely linear but damn if people don't know how to deal with linearity at low levels. I think I've genuinely only used six moves using him for the first time tonight and already got up to vindicator. If you have good instincts or can recognize when something is punishable you'll be able to win most of your matches just punishing with 1,2, whiff punishing with d+2, and spacing with d/b+2, d/f+1, and 1, occasionally using his command grab out of one of the buttons above buffered for 55 or near the wall for a cool 70 damage.
He'll definitely help with your fundamentals and spacing considering his dhalsim limbs and awful movement.