It’s a toss up between Sports Talk Baseball or one of the World Series Baseball games.
Sports Talk Baseball is fast, simple, retro-style baseball. It’s nothing terribly special. Just retro baseball that doesn’t screw things up too poorly, except for a funny play-by-play announcer who is always lagging behind.
World Series Baseball is an early attempt at a baseball simulation, with a behind-the-batter view and genuine pitch types. It’s pretty slow and bland. World Series Baseball 95, 96, and 98 all have the exact same gameplay.
I’ve seen some people online claim their love for Tony La Russa Baseball 95, but I don’t recommend it. It’s also more realism-based, but the action is just terribly slow and choppy.