Aggreed^ , but it's well worth the risk ,i think.
I got many plecos and slow moving fish but never had any issues.
Here some of mine that would do well and don't grow too big.
Pseudacanthicus Mustang Cactus Pleco L65, upto 8"
Oligancistrus Xingu new Polkadot Pleco L354, upto 10"
Or, like warborg suggested as well, Hypostomus, upto round about 1'.
Mind you big plecos can be very territorial, and like suggested above, make sure you have enough caves for them, preferably 1 more than the number of plecos you have.
btw the first 2 may be a bit harder to get due to the export ban.
The L354 is considered very rare in Holland.