Short answer: no, nobody else is anywhere near as ebook-savvy as Baen.
Long answer: take a closer look at Baen. The free library. Maybe pick up a book or two.
You might be surprised if you actually *try* some of the content. (Dunno if you have, but... It doesn't sound as if you have.)
Upfront, try Lois McMaster Bujold's MOUNTAINS OF MOURNING from the free library.
It's, technically, a murder mystery. But just technically. There's a lot more going on in there than a whodunnit. (Bujold has several other similar volumes in the Vorkossigan Series; Cetaganda, Memory, Komar, Diplomatic Immunity, all highly aclaimed. Though personally my favorite work of hers is A CIVIL CAMPAIGN, which is pretty much unique; you don't see too many comedies of manners in any genre these days, much less SF.) The lady can write. Period.
You may also want to Check out LORD DARCY, a collection of somewhat "different" murder mysteries.
Take a look at the fantasies and humor. (The Retief stories are fairly droll, PANDORA'S PLANET is a romp--wild and convoluted but funny if you enjoy screwball comedy). And then there's Esther Friesner anthologies...
Even their hard science SF is quite approachable; you don't need to be an SF regular to enjoy stuff like BOUNDARY (a paleontological mystery about a very odd fossil in a very odd place) or INHERIT THE STARS (a corpse is found on the moon. Human. 50,000 years old. It's been described as CSI: Clavius. Even better is Hogan's THRICE UPON A TIME. About a triple murder mystery where the victim is humanity itself. Three times.)
There's a lot more to Baen than just adventure SF and there's a lot more to SF than just adventure and space opera. Give it a try; that's what the free library is for, after all.
What do you have to lose beyond an hour or so of time?