Ecchi stuff I have watched is high school of the dead and highschool dxd... The humongous breasts don't really do it for me. :/
Would elfen lied be considered ecchi? I felt the nudity was used in service of the show's feel rather than just as fan service.
Most of your
ecchi tagged shows will have characters with massive breasts (at the very least one) - I have no idea why, but the creators seem fascinated by them. Although Infinite Stratos wasn't too bad in this respect. If you're looking for other ecchi shows that don't have planet sized boobs all over the place ... hmmm ... let's see ...
Yosuga no Sora - drama type, but don't watch it if you're bothered by elements of incest in the show
Shuffle! - romantic comedy/drama
Dakara Boku wa Ecchi ga Dekinai - fairly recent show
Chu-Bra - Comedy
Green Green - Comedy
Goshuushousama Ninomiya-kun - romantic comedy
Johikousei/
High School Girls - romantic comedy
Kono Naka ni Hitori, Imouto ga Iru! - comedy/harem
I could go on ... there's quite alot out there tbh.
As for Elfen Lied - while it had elements that would be considered
ecchi, I'd be inclined to agree with you that it served more of a purpose in the show apart from just being regular fan-service (Evangelion did this too to a degree).
So are there any anime's that have both ecchi and manservice in them... And are there any decent anime's that are ecchi / man service...
Isn't it also called yaoi?
Just general man-service wouldn't fall under the
yaoi tag ... it refers specifically to male-on-male (or gay, if you prefer) romance, and in
yaoi series you would expect to see specific scenes of sexual activity. The tamer version of this would be shounen-ai (or boys love) in which elements of male-on-male romance is present, but there's nothing explicit.
It's actually pretty difficult to nail down the exact degree of BL present before it switches to
yaoi - lovers of the genre will be able to better explain it to you, although I'd bet opinions differ.
Free!, however, doesn't fall under either. It's just the opposite gender version of cleavage/pantyshots, really.