I'll have to disagree, IMO the only plecos suitable for a 60L are Bulldog Plecos/Pitbull Plecos.60L seems too small for a fish that gets to 15cm
too small for some ancistrus but there are a few like the L111, L279, L289, L309, L327, L344, L352, L355, L349,ancistrus claro, puerto ayacucho, portel and triradiatus. though most wont be easy to source personally i would be looking towards hypans like L174, L250, L46 or peckolitia L134, L038, L103, theres also a really nice little plec in the panaqolus genus called the panaque maccus which are perfect for small tanks.