If you are looking for the absolute best balance of tenderness, rich beefy flavor, and ease of cooking for a basic pan sear, I would strongly recommend either a boneless Ribeye or a New York Strip steak. Both are standard staples in almost every supermarket meat department and respond exceptionally well to a hot skillet.
The Ribeye is generally the top choice for pan-searing because of its abundant intramuscular fat, commonly referred to as marbling. During cooking, this fat slowly renders throughout the meat, naturally basting the steak and providing maximum juiciness alongside a very rich, savory taste. When selecting one at the store, look for a piece that is at least one to one and a half inches thick with fine white flecks distributed evenly across the center.
If you prefer something slightly leaner that still offers deep flavor and great tenderness, the New York Strip (also labeled as top loin or strip loin) is an excellent alternative. It has a tighter grain structure, giving it a slightly firmer, satisfying chew while retaining plenty of moisture.
To get the best result tonight, remove your steak from the refrigerator about twenty to thirty minutes before cooking so it takes the chill off. Pat the surface thoroughly dry with paper towels, season generously with coarse salt and black pepper just before cooking, and sear it in a heavy pan over medium-high heat. Be sure to let it rest on a warm plate or cutting board for five to seven minutes before slicing so the juices settle.