Try lilium grand paradiso.

It grows relatively tall (4-6') and with a large rachime (umbel) of flowers. Very showy. Thick stems, too.

KL, how are you? I immediately thought of an oriental named " White Rhino:. I purchased several of these from Lisa Hunt in Oregon last year. This year they were about 6 ft tall, and this was their first year! If interested I can send one this fall. But, the only draw back.... They all are the size of a cantalope! LOL I am not kidding either! Joey