Holland Taylor is known for her imperious composure. Over her five-decade career, she has been cast almost exclusively in roles that demand significant degrees of sass and brass, which she somehow manages to deliver without showboating. Any tally of Taylor’s highlights would feel incomplete, but here goes: “Bosom Buddies,” “Romancing the Stone,” “To Die For,” “The Practice,” “Legally Blonde,” “The L Word,” “Two and a Half Men” and a number of acclaimed stage parts, including a play she wrote about former Texas Gov. Ann Richards.