Rolphie can be your go-to sans-serif, with 16 easy-to-read weights and 10 versions for each weight, and the subtlety of choice that represents. The versions contained in each weight are: Regular; Condensed; Half-Condensed; Expanded; Small Capitals: and their italic counterparts. (At heavier weights particularly it seemed to be justified to have two Condensed versions). Plus there's 20 funky versions with the letters all shook up (that would make a good title for a song), or jumbled around, plus some Shadow, Doubled-Up, College, and other FX versions.
In total there's 180 variations, giving a comprehensive selection of both standard and funky fonts, and that subtle degree of choice of weight. To make things easier, the weights are put in ascending numerical order from 01 to 16, and the FX versions have been stuck in the 80s and 90s, (like two musicians I know).
There are grouped packages available for certain weights (which have 10 fonts in them) and the complete family package (180 fonts) which represent better value than the individual fonts, and there's a basic package containing the Normal and Italic versions of all 16 weights (32 fonts). A limit of 5 sub-family packages has been imposed, unfortunately, which precludes a more comprehensive selection.
To let you know what's in the font that you might otherwise never know about . . .
With Discretionary Ligatures on, you get special characters if you type Mc St. Rd. Bd. Ave. c/o No. (p) (P) - include the full-stop/period.
With Stylistic Alternates switched on, you get plenty of extra characters - including a WiFi symbol (type Wifi or WiFi) / bullet numbers instead of ordinary numbers / that different U-dieresis / special characters for c/o No. Mc / an upside down ~ / a huge bullet, and different forms for cent, dollar, percent, per-thousand.
As you'd expect, there's all the accented characters for all Western European scripts using Latin letters, and standard ligatures, plus other Open Type features including Class Kerning, Slashed-Zero, Historical Forms, Sub- and Superscript numbers, fractions for halves, thirds and quarters, Ornamental forms giving bullet numbers, etc. There's also the main mathematical operators, symbols like card-suits and male/female signs and so on, and some more obscure stuff like schwa and O-horn, U-horn - and there's lots more if you can Access All Alternates. Much will depend on what your software recognises.
The Small Caps versions have (intentionally) lost the ligatures for lower case ff, fi, fj, fl, fr, fu, ffi, ffj, ffl, ffr, ffu.
The names for the weights are not absolute - we had to make up some names to make them stretch out to sixteen - so rather - see them as relative to each other, being in ascending numerical order by weight.