The Flash, but the ability to slow down is more realistic.
You can spin really fast to make tornados, but you’ve spun too fast too many times and now your balance is totally fubar all the time.
You can stretch like Reed Richards, but you get stretch marks AND the things you stretch eventually get saggy.
You can talk to fish like Aquaman but it turns out that fish are really, really stupid; dolphin just want fish; and octopuses are worse than cats.
Telekinesis but it works the same as if you were holding the object yourself. Picking up cars? Not without breaking your back you won’t!
Flight, but atmospheric physics is real. EG, flying at 35000 feet requires very warm clothing, and flying super-fast results in friction and/or body ripping winds and oscillations from your non-aerodynamic body.
Super healing, but it makes all parts of your body regenerate more quickly, including your hair and fingernails!
Mind control, but parts of your personality and the controlee’s personality mingle, mix, and get swapped around. For example, after controlling the mind of a bank robber, you start disliking banks while he suddenly likes cheese.
You can shoot lasers from your eyes but you need immense amount of caffeine (or any other substance that makes you jittery).
Shooting fire, fireballs, ice balls, or anything else from your hands: Same as laser eyes, but you are hypersensitive the jittery substance.
Invincible skin? Say hello to diabetes that is very difficult to control without insulin injections (or some other illness that requires regular injections to manage…I don’t really know that much about diabetes.)
Immortality/Omnipotence simply makes you realize the futility of life, humanity, and the universe in general and once hedonism loses its charm, you just wish for death.