Well, you're in luck. I have a couple of suggestions for you, some solid 70s fare that is a little more obscure but still good creepy fun. First up: Horror Express, a gem from 1972. You'd think it's a Hammer film, since it stars Peter Cushing and Christopher Lee, but it's not. It's a Spanish/British production set in 1906, with almost all of the action taking place on a train, the Tran-Siberian Express (indeed, the alternate title was Panic on the Trans-Siberian Express!). Lee is an anthropologist who has brought aboard the corpse of what he believes to be the Missing Link, which he discovered frozen in China. His rival, Cushing, is also on the train, and anxious to discover what Lee has in his crate. But what neither of them knows is that the specimen is not as harmless as it seems. The creature returns to life and begins killing people on the train. It is possessed by a strange force that makes its eyes glow and it is soon discovered that it can transfer from body to body. Soon enough there's a mad Rasputin-like priest, a buxom countess, drunken Cossack Telly Savalas, dead men coming back to life, and lots of bleeding from the eyes. The filmmakers do a good job building suspense and there's a feeling of genuine menace created by the situation of being trapped on the moving train with the creature.
For pure creepiness, this next film is one of my favorites. It's also a great entry in the ranks of zombie-dom, as it features amphibious Nazi zombies. Yes, roll that around in your head. I'm talking about Shock Waves (1977). Now as a zombie movie goes, it is light on gore. That's not what this film is about. This film is all about mood, and it has plenty of it. The way it's filmed, likely due to the low budget, there's a starkness to it that lends it that strange, quasi-documentary feel, sort of like the original Night of the Living Dead. A small group of vacationers head out on a yacht, experience odd phenomena that mess up their navigational instruments, and then have a near-miss with a huge ship at night. The next day, they discover that their boat is sinking, so they head for a nearby island. They also see the wreck of a large, old ship not far away. On the island they discover Peter Cushing -yes, he's in this one too -doing his best German accent. Not long after the castaways meet him, the amphibious Nazi zombies rise from the ocean floor and begin attacking the living. It seems they were part of 'The Death Corps', a Nazi unit composed of unkillable, undead assassins. The rest of the film plays out like one would expect, with the zombies attempting to murder everyone on the island in typical efficient German fashion. For good measure, it also has the ever-entertaining John Carradine as the captain of the yacht.
Horror Express was released on Blu-Ray last year and can be had relatively cheaply if you look around. Shock Waves is on DVD, no Blu Ray yet. Both are well worth seeing if you haven't caught them yet. They will certainly evoke that Bronze-Age flavor!