Id take Jones, DC, Gus, Rumble,Rashad, Machida, Shogun and Glover at their peaks to beat Alex more times than not. Better , more well rounded fighters. Alex arguably lost to 41 year old Jan. I can't believe I have to explain all these guys are better than 41 year old Jan.
I also think there were guys who could surprise Alex too like LHW Anderson, Chuck,Hendo, Randy, Wand, Tito, young Overeem. All these guys had the skills to beat Alex and I'd argue these guys at their peak were also better than 41 year old Jan.
I think your opinion is based on a dislike of Poatan, seriously most of the fighters you named would not be able to beat him:
Gus - Thats laughable, zero ground game and his standup is nowhere near as good, also chin was suspect even in his prime
DC - Looking back at his record I guess he was a LHW 10 years ago, so yes I will agree with this one, his wrestling and pressure would have likely been too much for Poatan
Rumble - No, just no...heavy hitter but that was about it, super entertaining though - RIP
Rashad - Ha fuck no, too small and not strong enough to implement his wrestling and even if he did Shad was never great at submissions or cardio so any success he had in wrestling would be limited
Machida - Too small, it would have been a fun fight but as great as Machida's standup was his chin was never solid and Alex would have eventually hit him (however it is possible Machida could have evaded like he did so many times in his career and won a decision)
Glover - 50/50 and that's only if Glover decided to wrestle, which he only started to do late in his career.
Jones - Would beat Alex 100%
Wand, Tito, Chuck > WTF...honestly? As much as a loved that area of LHW's they would stand zero chance of beating Alex even in their prime.
As for all of the above being better than 41 yr old Jan...fuck off lol, Jan has been at his best over the last 2-4 years.