Well, I have seen a dead person raised: My wife. She was dead for an hour and a half, and God Sovereignly raised her. I was there. She was no longer alive. And, I was not doing anything, or trying to raise her, or anything. God did it without anyone doing anything. The doctors were stunned and nearly speechless. This happened in Cleveland Clinic. She went into cardiac arrest, and nothing they did would bring her back. She had flat-lined. An hour and a half later, her son noticed a faint pulse, and asked for the monitors to be hooked up again. She had a heartbeat and began breathing again. Over the course of 18 hours, she came back, with zero organ or brain damage. 6 weeks later, she received a heart transplant. Her new heart is doing perfectly, after a year. There was and is no loss of mental function, motor skills, or any other health problems. She is in excellent health.
Now, I know it could be asked, "if God raised her, why didn't He also heal her heart?" All I can say is, you'll have to ask Him that question. I don't know. But I cannot deny what I saw with my own two eyes, and heard with my own two ears. Cleveland Clinic is one of the finest heart hospitals in the world. For days afterward, groups of doctors would just come into her room and stare at her, not believing their eyes and ears. They have no medical explanation for her return from death, and recovery. And they freely admit it. I've talked with those doctors. Even they say that God must have intervened.
So, I say with all seriousness and no malice, anyone who says that God doesn't do miracles today, needs to get their theology adjusted. If your theology doesn't allow for that, your theology is wrong.