Can you name popular tv westerns and the stars of them ? and why do they not make western tv series anymore ?

i can remember loads but not all the stars my favourite top 5 were rawhide with clint eastwood high chapparel with lief errickson cheyanne body with the brilliant clint walker shane with david carradine allthough the film with alan ladd was better and bonanza with dan blocker as hoss cartwright and who was it that played the rifleman ?