Cynthia Littleton Business Editor The major broadcast networks are trying very hard this year to do what they do best – create franchise drama series built around the adventures of larger-than-life characters. Kathy Bates, Kaitlin Olson, Carrie Preston and Shanola Hampton are among the female actors hoping to click as distinctive protagonists with new series in the 2023-24 season. Bates will bring to life a next-generation “Matlock,” while Preston limns a new chapter for Elsbeth Tascioni, the attorney character she has played on and off on CBS’ “The Good Wife” and Paramount+’s “The Good Fight” since 2010. This is good news for the hundreds of international television buyers heading to Los Angeles for next week’s LA Screenings market. Another welcome development is that the largest media congloms are now on a big push to reopen their doors to third-party buyers, after a few years of holding back the biggest shows for in-house streaming services.