Gaim. But Ex-aid so far looks like it will take that spot.
For sentai I got a few but if I am to select one Gokaiger.

Anybody else feel like we're long overdue for a different type of protagonist in Rider? I mean, don't get me wrong, most of the protagonists in the post-Decade era have been fantastic, but they all sort of fit into the same idiot/naive hero category.

Love 'em or hate 'em, guys like Takumi and Tendou were definitely unique protagonists for Rider and they don't have to exactly replicate them, but I would like to see just the occasional protagonist that isn't all "I want to protect everyone's smiles!" all the time. Or even someone like Shotaro who tries really hard to be cold and detached but just can't do it.

Well, if you count Kamen Rider Amazons, we have Haruka Mizusawa and Jin Takayama...

Or someone like Hibiki who just trains hard and does his job. I'd really like to see an older main Rider again, but I know these days that's pretty much impossible.

This would be a really cool plot for a crossover movie actually. I can just imagine the collective panic the riders from each series if something like that happened.:p

Maybe a protagonist rider who lives and dies by Tony Soprano's famous catch phrase "forget about it"?

Depends on the order it happens in. Could be any one, two or all three, depending on how Bugsters body disappearing and Orphenochs resurrection interact.

The thing to remember is that Bugsters and Phantoms are separate entities from their hosts, while Orphenochs are the original person resurrected, so I doubt fusion is a real possibility.

How would you make kamen rider gaim gaiden baron story better?

1) Add Hikari Studio and everyone in it.
2) Give Natsumi Hikari Natsumikan lockseed and a Sengoku driver.
3) Let someone says "Onore Decade!!!"
4) Profit.

Is Baron's banana lock seed really saying "Knight of Spear?" It sounds like there's way too many syllables, even for Japanese. Like to me it sounds like it's saying "Knight of-u Spear ___ ___" with a difficult to make out, two syllable word at the end. It's always bugged me when every other lock seed has crystal clear words.