Since this was touched on in the Worst scene ever thread, let's start some a new one:

Who are the most "yell-y" people in original Five-O? You can include anything that you consider nails on a chalkboard. From speechifying to just being crazy. Whether the people make sense or not is no difference. Who would you put on this list?

One I can think of is Nehemiah Persoff in S11E12 & 13 Number One With A Bullet. As Allie Francis he yells at his lawyer (George Herman) after his guy Bernie Adams (John Barry) is killed when his car explodes. Francis goes off because he originally asked if the hit was personal but the lawyer hems and haws about the motive. There is also a scene where a dead sport fish is left in his Hawaii hotel room and he throws a fit yelling at the top of his lungs. Note that anytime he converses with McGarrett, Francis is very collected.

Probably not what you guys have in mind, but it's a start.