What do you like on smaller formats? You won't suddenly start liking any equivalent focal length as your only lens if you don't already. Your kit is totally a personal choice. I like 28mm equivalent focal length for landscapes, 50mm efl for general use, and a 100mm efl for portraits. In 4x5, that's 90, 150, 210/240 (more like ~75mm efl).
All modern lens designs are good, figure out the length you want, how much coverage you'll need for the movements you'll use, and buy something. Multicoating is nice, but don't break the bank, the first coating is the most important. Don't discount older lenses, but don't pay a mint for something exotic either. A Kodak Anastigmat or Ektar 203mm f/7.7 is a great choice for a portrait-ish length. If you're going to go nuts on movements, get a plasmat (something like a Symmar).
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