Geordi LaForge.
So much potential in the first season. After that first season, they didn't really know what to do with him...except metaphorically cut off his man parts where every woman turns him down except one that is visibly portrayed by a black woman. Yes, he supposedly married someone named Leah (or Leia) but was it Leah Brahms? Leia Organa? Who?
Not to mention, whether he married into the Rebel Alliance/The Resistance or not. That was an alternate reality that may or may not have happened.
In "Arsenal of Freedom" they gave him temporary command. It would have been awesome to see him come across the bitchy engineer that gave him trouble in a later episode where said bitchy engineer had to 'learn a lesson' by way of respecting the command structure even if he doesn't agree.
Yes, he was in command of the
USS Challenger, but that too was an alternate reality.
In "The Naked Now" he talks about Yar's 'beauty' and one might think the writers were trying to set those two up. Star Trek doesn't always do relationships well (albeit, I do like the Spock/Uhura relationship, even though Uhura is pretty much defined by her relationship with Spock - something that may or may not change with
Star Trek Beyond) but that would have been interesting to see, especially in the 1980s if they would actually be bold and 'go for it.'
With all that said, Beverly Crusher was an underrated character, too. I think her personality was brighter in the movies, even though the movies were pretty bad. I also found it cool when she took command at times, although I haven't watched those particular episodes (or episode) in quite awhile.
I remember not liking her attitude in the 1st season. She was kind of, well, bitchy. Especially in the Edo episode where Wesley was going to be executed. I remember feeling like 'Well, he
did break the rules. Now he has to pay the price!'
I think her character was a lot 'looser' in the films, the same with Deanna Troi. (Although, Troi's accent became more English than alien). They weren't as stiff as they were in the series.