For it's now inspiring design lines I'm another vote for the Theoben Rapid in the PCP category

It gave us buddy bottle, magazine fed bolt action, floating barrel, reliability mostly borne out of its simplicity, and dominated in field and target until others started to copy it's features and back it up with better marketing and distribution

As much as it hurts to say it the HW77 in the springer category only because it pre dates the TX range by 7 odd years, 40 years later is still a premium rifle, only slightly bettered by HW with the 97 (drops iron sights, better options for silencers) - but if you had an original '84 model that had been shown the minimum amount of care and maintenance it would be just as good as a 2024 model fresh out of the box