You don't need a lot of patterns. Carry fewer patterns in various sizes. What you carry should be tuned to the time of year to some extent.
Examples: Minnow or Baitfish: Rolled muddler, Tied down Mylar minnow #6 to #10. You can throw in a regular muddler and that will work (all year)
Streamers: Mickey Finn - same sizes. You can throw in a Professor or a darker set of patterns like a March Brown wet, a Coachman or a silver brown (mostly in the fall)
Alevin: Egg & eye (winter only)
Nymphs: generalistic nymphs # 6 to #16 ie hare's ear, half back, prince nymph (best winter & early spring but all year)
Midges/Chironomids: griffiths gnat, TDC : these are usually very small #16 to #18. Trout love' em tho' (winter early spring)
Emergers: any soft hackle #10 to #16
Dry Flies: Mayflies and stoneflies. Mays are in 2 sizes basically either a #10 (March Browns) or small like a #16. Adams, compara duns and various parachutes in browns and dark greys. Stones too are either tiny (#18) or larger (#10). A griffth gnat works for the small ones and any larger pattern like an elk hair caddis etc for the larger ones. (mostly winter to early spring)
after that some wooly buggers, black and olive #8 & 10. A white or cream one works as a flesh fly.Im usually put a gold bead on 'em. (anytime)
Eggs: late fall early winter.