Hard compound tyre

Personally I have found massive variability in my tyres. Sometimes I get 6000+ miles out of a tyre. Another year 2000. Its just pot luck. What I did find really help with slightly reducing my tyre pressure. Having them at max just means when you hit a shard etc the cut on the tyre bursts wider. FYI I just use regular gaterskins (not the hardshell ones).

Continental Top Contact Reflex will easily do over 6000 miles. First class touring tyres.

Conti 4 Seasons are a lighter construction, good puncture resistance and I got 6000miles out of my last pair (1 pinch flat).

If you are getting 4-5000 miles per pair then you aren't doing too badly. The problem is that there is always a trade off and harder tyres tend to feel very wooden and can often be heavy whilst offering poor wet weather performance. If you place durability/puncture resistance above all factors then Schwalbe Marathon (Greenguard or Plus) are the way to go but don't expect to feel much zip. Failing that, why not look at a new set of decent training tyres a few times a year as a pretty small outlay?? Plenty of cost effective options like Vittoria Rubino Pro, Conti Gatorskins, etc.

I don't know if this will draw scorn but I found triban puncture protects to be pretty solid on a glass strewn path. I replaced then with softer puncture resists and got 2 punctures in 6 weeks on same path before replacing these with new puncture protects. Pretty cheap too.