ENT lasted 4 seasons. So did QL! Yet QL seems like it was on far longer
Umm... that's because it did. Quantum Leap lasted five
I think I'd have to agree with Nerys Ghemor
's sentiments regarding Bakula as Archer. After Archer becomes grittier and his temper gets shorter, I felt the character became a bit more one dimensional. With the exception of Damage, he just goes from zero to super-annoyed in the space of a scene
Season 4 was odd because we see season 3 Archer in brief bursts, very occasionally you'd get a hint of the old explorer from the first two seasons. The rest of the time, I'm not really sure where his character was at, and I think the writers did him a disservice, as he is a very talented and likeable actor (the rest of the cast's praise for him is testament to that).
Anyway, to drag this post screaming and bleeding back on topic. Alaimo as Shran? No. Maybe though, he could've had a recurring role as one of Starfleet's top brass or maybe a political figure as they got closer to forming the Federation. He does bring a certain gravitas to his roles (i.e. the qualities Aquehonga
mentioned), even if it's only a one-time character.