In a classic example, DC did a good deal of war comics in the 60s. One was called "The War that Time Forgot". It was World War II... but there was an island full of giant apes, military test robots, an elite military unit called "The Suicide Squad" (related to the later DC group), circus acrobats, and, of course, dinosaurs.
Gold Digger has a race of technologically advanced dinosaurs who serve as both a major source of archaeological finds for the scientists in the cast to dig up and the cause of a whole lot of bad events in ages past. They also made two dinosaur-esque races via genetic engineering, the Amonians and the Dragons, who both have regular characters in the cast.
Marvel 1602 had little dinosaurs running around Europe, including at least one seeming to be Carlos Javier's pet. Not to mention that the standard big dinos can be found in North America.
A Golden Age comic (1946's "Batman" #35) shows the original origin of the T. Rex trophy: a "souvenir" from an adventure Batman and Robin had on "Dinosaur Island," a Jurassic Park-style theme park with robotic dinosaurs (versus genetically-engineered ones).
2000 AD had Flesh, a story about future cowboys going back in time and killing dinosaurs for their meat, which was then exported back to their own time. This was used to provide STOMPY DINOSAUR ACTION crossovers into both Judge Dredd and ABC Warriors. In the case of the latter, dinosaurs ended up on a terraformed dystopian Mars.
Major Bummer gave us Tyrannosaurus Reich. Can't believe that got a mention in the other wiki before getting here.
Dinosaur Bop / Wanda et les dinosaures (Wanda and the dinosaurs) is set in a comical (with realist drawings) post-apocalyptic world were humanity regressed at prehistoric age (but more like "American sixties in a prehistoric setting"). For no reason, dinosaurs are here anew, and are used as pets, food or... cars (but T. rex is still a predator and wreck poor Eddy's car).
The title character of Sláine has gone up against dinosaurs animated from amber.
The Tar Pits in Sin City feature dinosaur statues. Frank Miller said he put them there as an excuse to draw dinosaurs.
In All-Star Superman. the Subterranosaur are descendants of dinosaurs who escaped extinction by digging their way to the center of the Earth. Their leader is the Dino-Czar.
The villain in Neil Gaiman's Mr Hero: The Newmatic Man is Henry Phage, an immortal velociraptor at the head of a multidimensional corporation whose flagship product is the corruption of souls.
Xenozoic Tales features lots of dinosaurs. after an environmental apocalypse drove humanity into underground bunkers, humanity returns to the surface to find dinosaurs along with species from all prehistoric eras roaming around. The series came to be associated with the name "Cadillacs and Dinosaurs", just to make sure people understood the coolness.
The graphic novel Dinosaurs vs. Aliens adds aliens to the mix. The dinosaurs themselves are depicted as sentient and capable of tool-making and wear warpaint and body armor to give them more of an edge.
