Preheat the grill: Heat a gas or charcoal grill to medium-high. Clean and oil the grates so the corn doesn’t stick.
Make the herb butter: In a small bowl, mash together the softened butter, parsley, chives, thyme, garlic, lemon zest, red pepper flakes, and a pinch of salt and pepper. Taste and adjust seasoning.
Set aside at room temperature.
Prep the corn: Remove the husks and silk. Brush each ear lightly with olive oil and season with salt and pepper.
Grill the corn: Place the corn on the grill. Cook for 10–12 minutes, turning every 2–3 minutes, until the kernels are tender and lightly charred in spots.
Butter and finish: Transfer the hot corn to a platter.
Spread or roll each ear in the herb butter so it melts into the kernels. Add an extra sprinkle of salt if needed.
Serve: Serve immediately with lemon wedges on the side for a bright squeeze over the top.