Hollywood giant Paramount is replacing its previous boss with a trio of managers in the midst of merger negotiations, the company said on Monday. Instead of chief executive officer Bob Bakish, the three top managers of the various divisions are to lead the group, Paramount said. “To lead and oversee the company moving forward, Paramount Global has established an Office of the CEO, consisting of three senior company executives: George Cheeks, President and CEO of CBS; Chris McCarthy, President and CEO, Showtime/MTV Entertainment Studios and Paramount Media Networks; and Brian Robbins, President…