What is the best slow cooker beef recipe or even one for tasty beef roasts?

I make a pot roast in the slow cooker or the oven like this: Rub salt and pepper into the roast, then place it with the fattest side up, in the cooker or pan. Add one cup of cold coffee and about a half cup of apple cider vinegar, pouring it so that it goes down the side of the meat. Sprinkle a little garlic on top, along with whatever other seasonings you prefer. I sometimes use oregano, sometimes ginger or sage. That's about it. When I add vegetables, I put the same spices on them. The coffee brings out the flavor of beef and the vinegar tenderizes it so that it comes out very tender and flavorful.

This one is a typical beef preparation of the east. Give it a try...Marinate beef in papaya(raw)puree overnight. This tenders the meat and the cooking time is reduced...Also for 1kg meat, add 1/2 papaya.If you want add salt, ginger garlic paste 1 n half tsp each and some pepper powder...Do not add water. COok and serve it dry with bread..

Whether a rump roast or (recently on sale) a sirloin roast... I always use my electric skillet. I fill with water, add beef seasoning like Herbox to make the water more beefy flavorful and then put the roast in there, add some meat tenderizer and put the lid on. I set the temp to 150*-200* and in about 1,1/2 hour it is so perfect! I cook it until about 120*. Then I slice it and it is rare, but I love it that way, but for reheating left overs (save the juice too)...if you reheat it, it continues to cook and then gets tough. So, I slice it rare... and then for next meal.. I heat the beef juice to boil, then turn it off and add the meat. That way it warms it up just fine, without cooking the meat anymore and you still have a moist, tender and even rare slice of great beef!