If you like van Vogt and the Weapon Shops, you might like Harness' The Paradox Men. I'm not sure of how narrow a focus you want, though. I would mention Leiber's The Big Time and other "Changewar" stories, as well, along with Asimov's The End of Eternity and maybe Kuttner's The Time Axis. Then there are books doing weird things with time via near-light speed travel, black holes, etc.: Haldeman's The Forever War, Anderson's Tau Zero, Pohl's Gateway, Sheffield's Between the Strokes of Night (which does a neat thing with the "times" both inside and outside the ship). Then there's a sort of time freeze inside the "bobbles" in Vinge's "Peace War" stuff. Hamilton chucks a city a million years into the future in City at World's End, IIRC. Then there are zillions of stories that do funky things with time like "Slow Glass", though I forget who wrote it right now. Many specialized theme anthologies might suit.
I don't tend to care much for time travel as such, unless it's messing with physics as in the Tau Zero group I mentioned, so I haven't read a lot of famous specifically focused stuff like Piper's Paratime stuff and Anderson's Time Patrol stuff, but I suspect that gets more into alternate history and branching more than looping or freezing.
Anyway - hope some of that helps.