Set the grill to medium-high. Husk the corn. Grill 10 to 12 minutes, turning often, until charred in spots. Transfer to a cutting board and set aside to cool.
Cut the kernels off the cobb.
Put the corn, red onion and cheese in a medium salad bowl. Drizzle with the olive oil and toss.
Add the fresh herbs and toss again. Taste and add salt and pepper. Serve.
Notes
Corn can be grilled 1 day ahead before assembling the salad. Can be eaten warm or cold.