I know you were soliciting personal ideas from the forum members here, but here's some outside help:
This ol' Tone Report article has one suggestion already made by BtR in this thread, and a few other iconic pairings:
reverb.com
Tube Screamer and Rat (see thread-post #2 above)
Muff & Power Boost
Blues Breaker & Klon
Analogue-delay and Digital-delay.
Boss has some ideas for pairing the iconic brand's own pedals, but you could always sub out for similar circuits:
Fuzz can be one of the most exciting pedals on a guitarist's board. Here are some powerful recipes for combining it with other effects.
articles.boss.info
Chorus adds an extra dimension when paired with other pedals. Here are some dynamic suggestions for combining it with different effects.
articles.boss.info
Regardless of whether you like TPS, Mick & Dan have a few decent suggestions.
www.thatpedalshow.com
Most of the pedals here have doppelgängers in the PPCB shop:
6 of my favourite drive pedal pairs
www.guitarpedalx.com
I've always thought FLANGER > TREMOLO sounds great:
Some simple but inspiring pedal combinations to try out if you're looking for something new.
www.ultimate-guitar.com
Lots of Reddit and TGP and other places that have pedal-combo suggestions, but I'd rather hear from people here.
There's something different about suggestions from fellow pedal-builders as opposed to the commercial-pedal-using-masses.
Hopefully more PPCB-forumites will reply to the thread.
I haven't built it yet, but I'm planning on building an Op-Amp Muff and Dist II, even though I'm no Cilly Borgan fan.
Here's a much cherished combo-pedal from
Dwarfcraft (when they owned the Devi Ever brand) that I got just before I began building my own pedals, it has the Torn's Peaker and Ruiner circuits inside: