Thank you already for not including DBZ, 'cause those guys are ugly. Yes, they're naked, but who cares; they're still not fanservice.

I'd argue also that male fanservice isn't as straightforward as female fanservice - with a girl you just have to show some cleavage or a panty shot and it's automatic, but considering that women's fixations vary more, there's no one body part that automatically is going to make every single one of them drool. (which is why the ass-shot idea bothers me. >_<; but it's your vid.)
Fanservice featuring guys would be more in how they look and are presented and not just "ooh body part". Or nudity, which is what makes it complicated to spot if you don't actually LIKE guys... for instance, the "Vash looks badass" moments in
Trigun come to mind, but I'd wager that most people wouldn't peg that as fanservice. It's just damn good-looking.
OK, enough of that. Leeeeet's see here.
...
(crickets chirp)
Unfortunately, just about anything I can think of is un-naked, already named, or out of bounds (Yuki from
Gravitation spends most of his screen time posing prettily).
Eh, it's difficult because of the way "fanservice" is defined here... my brain doesn't work like that. heheh.
(Aside: I'd thought of doing a pair of fanservice videos, one of guys and one of girls, but it'll probably be thousands of years till I have a DVD collection big enough to attempt that.

So if anyone wants to snag my intentionally obvious song, "Even Better than the Real Thing," enjoy.)