For my Teletype, I got a cheap (price-wise) but very nice Magicforce 68, which does not have F keys but has proper arrows and numbers, looks good and does not have backlighting (which makes my Teletype crash, newer ones from the latest batch should be immune to that).
You need a key combo (Fn + number) for the F keys. which is fine but not really a one hand solution if you want to trigger scripts while playing something at the same time.
These are really cheap but work really well for me. Note that only the version with Outemu switches does not have backlighting,
Assuming you’re in the US, they’re $40 on amazon (I bought mine for the same price in Japan) :
If you want compact but with F keys the Vortex Race 3 seems like one of the best options for Teletype.