Hi,
I am 6ft 0, 34" waist (33 when fit) & have 33" leg (34" dependent on manufacturer)
My newest tights are Ale' brand ... Edit. Size Large (Italian) & are longer than advertised (sent my normal XL size back).
I also have Sportful 'No Rain' bib tights which are generous in length compared to most (XL)
Castelli (Italian) are quite short for reference in comparison. (XL)
None are very cheap, but reasonable at sale prices from wiggle, evans etc.