Pick any superhero, then look at their allies and rogues gallery. You have a winner every time.
Ice, Killer Frost, Icicle, Captain Cold, and Mr. Freeze.
The flash, kid flash and reverse flash
-Jay Garrick Flash
-Barry Allen Flash
-Wally West Kid Flash/ Flash
-Bart Allen Impulse/Kid Flash/Flash
-Jai and Iris Allen
Superman, supergirl, starfire. Starfire’s are a little different, but I’m pretty sure their powers all come from the sun, they’re all impervious, and they all shoot lasers from their eyes.
Half of the second incarnation of the Doom Patrol has some kind of ability to shoot or heat things from their hands. Also, a lot of different black superheroes were given lightning powers for some reason.
To add to @Zomebodys list of freeze powered characters. Blue Snowman & Minister Blizzard. Some of my favorite B title WW villains.
Every one on committed flash characters so heres mine. Sorry if i spell wrong Ra’sh al gaul, Talea al gaul, and Damian Wayne.
Kid Flash, the Flash, Impulse. Killer Frost, Captain Cold, Mr. Freeze, Icicle Jr., Icicle Sr. All Aqualads, Aquagirl, Lagoon Boy, Aquaman. Wonder Woman, all Wonder Girls.
Lanterns (generally, and more so by color)
A lot of the Aqua family have overlapping abilities as do the Amazons, depending on versions