Stir together oil and next 3 ingredients; rub both sides of roasts with oil mixture. Set roasts aside.
Brush tomato slices and corn with vegetable oil. Sprinkle tomato slices evenly with 1/4 teaspoon salt and 1/4 teaspoon pepper.
Coat cold grill cooking grate with grilling spray; place on grill. Place beef, tomatoes, and corn on grate. Grill, covered with grill lid, over medium heat (300° to 350°). Grill roasts 7 to 9 minutes on each side, tomatoes 5 to 7 minutes on each side or until tender, and corn 15 to 18 minutes or until tender. Let beef stand 5 minutes; cut into thin slices. Serve with tomatoes, corn, and Chipotle-Lime Cream.