It didn’t use to be my favorite, but the last 18 months or so I’ve been tearing through novels about super-competent he-men who take on the odds. I’ve gone through all the Longmire, Joe Pickett, Jack Reacher, and Parker books – who’s next?
Pretty much any era, any setting, any genre (I mostly dislike Mob or War stories.)
Whatcha got for me?
John Sandford’s Lucas Davenport (Prey) series, and Michael Connelly’s Harry Bosch series.
EDIT: Also, if you like the idea of a sci-fi murder mystery (a murder on a big spaceship!), you could try Spindown, which happens to be by a Doper who goes by @iiandyiiii.
There is also Clive Cussler’s Dirk Pitt series.
Cú Chulainn
maybe other legendary badasses like Odysseus
John D McDonald’s Travis McGee certainly fits the he-man bill.
…and I don’t know how I mentioned the classical connection without explicitly mentioning the Labours of Hercules, the ultimate he-man.
Two words: Repairman Jack. (OK, more than two words. Start with “The Tomb”. If you don’t like it, fine. If you do, there’s more. Lots more.)
Richard K. Morgan’s Takeshi Kovacs novels for science fiction.
Richard K. Morgan’s A Land Fit For Heroes trilogy for fantasy.
Chris Bunch and Alan Cole’s Sten series. Set in a far distant future, Sten, Alex Kilgour and the rest of the gang serve as the Eternal Emperor’s troubleshooters, until things go from bad to worse to catastrophic. Great series!
Did you mean Spenser books (by Parker), or something else?
The Parker books by Richard Stark (pseud. of Donald Westlake.) Professional ‘heister’ who masterminds some complex capers. Not out to commit murder – but if the circumstances require it…
BTW, I’ve seen others multiquote, but I cannot figure out the trick, so clumsy improve will follow.
iiandyiiii Ah, Davenport! I forgot, he was part of my binge already, as was “that fuckin’ Flowers,” but Harry Bosch is a new name for me. Also have to see if can track down that other guy you mention. 
Czarcasm Hmmm. I tried one of the first Dirk Pitt books and wasn’t captivated, but maybe I should give him another try. Heaven knows there are plenty of 'em.
DPRK Chulainn is new to me, but Odysseus I read decades and decades ago. Too bad they didn’t go in for endless series the way authors do now. 
Wolf333 Whoa, I’d forgotten all about Travis McGee. I read two or three from a ‘lending library’ run by a place that rented cottages on a New Hampshire lake, a service to the renters to make up for the all too common rainy days. Hmm. I wonder why they haven’t made a TV or movie series about him?
E-DUB Another totally new to me name, excellent! And apparently a long series, even better! Thanks.
Snowboarder_Bo and Silenus And the same to both of you for new-to-me names! I love both SF and fantasy.
I have it on good authority that that Mickey Spillane sure can write.
Y’know, if that’s what you want to do tonight…
The Jack books simply must be read in order. (Says the guy who discovered the series around book 4.)
Here is your Heroic He-Man binge read series:
There are the Spenser, books, by Parker, and the Parker books, by Stark, but somehow no-one has gotten around to writing the Stark books, by Spencer.
The early Matt Helm books, by Donald Hamilton. (The last few sucked. So did the movies.)
Johnny Fedora, by Desmond Cory.
Not exactly a He-Man series but The Expanse series is definitely a good read. I guess Amos kinda qualifies; he’s pretty bad ass.
Dashell Hammett’s one of the greats in this genre. Red Harvest is supposedly the inspiration for Yojimbo, which is in turn the inspiration for Last Man Standing. When I read the book, I’d recently seen Last Man Standing, and I thought the latter was a more-or-less direct adaptation.
Plot: detective comes to town. Everyone in town is a murderous asshole. Detective manages to turn all the violent assholes against one another and kill the ones who aren’t killed by another one. The end.